1220246155 has 8 divisors (see below), whose sum is σ = 1464499584. Its totient is φ = 976060800.

The previous prime is 1220246123. The next prime is 1220246161. The reversal of 1220246155 is 5516420221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220246155 - 2⁵ = 1220246123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39475 + ... + 63235.

It is an arithmetic number, because the mean of its divisors is an integer number (183062448).

Almost surely, 2^1220246155 is an apocalyptic number.

1220246155 is a deficient number, since it is larger than the sum of its proper divisors (244253429).

1220246155 is a wasteful number, since it uses less digits than its factorization.

1220246155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34037.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1220246155 is about 34932.0219139975. The cubic root of 1220246155 is about 1068.6015897795.

Adding to 1220246155 its reverse (5516420221), we get a palindrome (6736666376).

The spelling of 1220246155 in words is "one billion, two hundred twenty million, two hundred forty-six thousand, one hundred fifty-five".