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BaseRepresentation
bin100101001111011001101
32021222221100
410221323031
5303022201
642053313
713241505
oct4517315
92258840
101220301
11763915
124aa239
13339594
1423aa05
15191886
hex129ecd

1220301 has 6 divisors (see below), whose sum is σ = 1762670. Its totient is φ = 813528.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220301 is 1030221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1212201 + 8100 = 1101^2 + 90^2 .

It is not a de Polignac number, because 1220301 - 29 = 1219789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 135589 = 1220301 / (1 + 2 + 2 + 0 + 3 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67786 + ... + 67803.

21220301 is an apocalyptic number.

It is an amenable number.

1220301 is a deficient number, since it is larger than the sum of its proper divisors (542369).

1220301 is a wasteful number, since it uses less digits than its factorization.

1220301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135595 (or 135592 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1220301 is about 1104.6723496132. The cubic root of 1220301 is about 106.8617599275.

Adding to 1220301 its reverse (1030221), we get a palindrome (2250522).

It can be divided in two parts, 1220 and 301, that added together give a square (1521 = 392).

The spelling of 1220301 in words is "one million, two hundred twenty thousand, three hundred one".

Divisors: 1 3 9 135589 406767 1220301