1255994290 has 16 divisors (see below), whose sum is σ = 2261205720. Its totient is φ = 502305280.

The previous prime is 1255994249. The next prime is 1255994303. The reversal of 1255994290 is 924995521.

It can be written as a sum of positive squares in 4 ways, for example, as 875627281 + 380367009 = 29591^2 + 19503^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1255994290.

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, 80226 + ... + 94594.

Almost surely, 2^1255994290 is an apocalyptic number.

1255994290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1255994290 is a deficient number, since it is larger than the sum of its proper divisors (1005211430).

1255994290 is a wasteful number, since it uses less digits than its factorization.

1255994290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23117.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 1255994290 is about 35440.0097347616. The cubic root of 1255994290 is about 1078.9365074044.

The spelling of 1255994290 in words is "one billion, two hundred fifty-five million, nine hundred ninety-four thousand, two hundred ninety".