1258172056 has 16 divisors (see below), whose sum is σ = 2364004800. Its totient is φ = 627770784.

The previous prime is 1258172053. The next prime is 1258172063. The reversal of 1258172056 is 6502718521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258172051) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 160335 + ... + 167998.

It is an arithmetic number, because the mean of its divisors is an integer number (147750300).

Almost surely, 2^1258172056 is an apocalyptic number.

It is an amenable number.

1258172056 is a deficient number, since it is larger than the sum of its proper divisors (1105832744).

1258172056 is a wasteful number, since it uses less digits than its factorization.

1258172056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328818 (or 328814 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1258172056 is about 35470.7211091063. The cubic root of 1258172056 is about 1079.5597359592.

The spelling of 1258172056 in words is "one billion, two hundred fifty-eight million, one hundred seventy-two thousand, fifty-six".