1204102155 has 32 divisors (see below), whose sum is σ = 1994526720. Its totient is φ = 619655040.

The previous prime is 1204102153. The next prime is 1204102169. The reversal of 1204102155 is 5512014021.

It is not a de Polignac number, because 1204102155 - 2¹ = 1204102153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1204102153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163329 + ... + 170541.

It is an arithmetic number, because the mean of its divisors is an integer number (62328960).

Almost surely, 2^1204102155 is an apocalyptic number.

1204102155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1204102155 is a deficient number, since it is larger than the sum of its proper divisors (790424565).

1204102155 is a wasteful number, since it uses less digits than its factorization.

1204102155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1204102155 is about 34700.1751436502. The cubic root of 1204102155 is about 1063.8680781638.

Adding to 1204102155 its reverse (5512014021), we get a palindrome (6716116176).

The spelling of 1204102155 in words is "one billion, two hundred four million, one hundred two thousand, one hundred fifty-five".