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1220034245 = 5244006849
BaseRepresentation
bin100100010111000…
…0011111011000101
310011000201011100112
41020232003323011
54444312043440
6321021322405
742143056103
oct11056037305
93130634315
101220034245
1157674a871
122a0706405
131659ba371
14b8066c73
1572196965
hex48b83ec5

1220034245 has 4 divisors (see below), whose sum is σ = 1464041100. Its totient is φ = 976027392.

The previous prime is 1220034239. The next prime is 1220034259. The reversal of 1220034245 is 5424300221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5424300221 = 47115410643.

It can be written as a sum of positive squares in 2 ways, for example, as 390536644 + 829497601 = 19762^2 + 28801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220034245 - 28 = 1220033989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220034245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122003420 + ... + 122003429.

It is an arithmetic number, because the mean of its divisors is an integer number (366010275).

Almost surely, 21220034245 is an apocalyptic number.

It is an amenable number.

1220034245 is a deficient number, since it is larger than the sum of its proper divisors (244006855).

1220034245 is an equidigital number, since it uses as much as digits as its factorization.

1220034245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244006854.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1220034245 is about 34928.9886054549. The cubic root of 1220034245 is about 1068.5397278151.

Adding to 1220034245 its reverse (5424300221), we get a palindrome (6644334466).

The spelling of 1220034245 in words is "one billion, two hundred twenty million, thirty-four thousand, two hundred forty-five".

Divisors: 1 5 244006849 1220034245