1255917090 has 16 divisors (see below), whose sum is σ = 3014201088. Its totient is φ = 334911216.

The previous prime is 1255917031. The next prime is 1255917107. The reversal of 1255917090 is 907195521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20931922 + ... + 20931981.

It is an arithmetic number, because the mean of its divisors is an integer number (188387568).

Almost surely, 2^1255917090 is an apocalyptic number.

1255917090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1255917090 is an abundant number, since it is smaller than the sum of its proper divisors (1758283998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255917090 is a wasteful number, since it uses less digits than its factorization.

1255917090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41863913.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 1255917090 is about 35438.9205535383. The cubic root of 1255917090 is about 1078.9144012516.

The spelling of 1255917090 in words is "one billion, two hundred fifty-five million, nine hundred seventeen thousand, ninety".