1257252359 has 16 divisors (see below), whose sum is σ = 1397088000. Its totient is φ = 1121862720.

The previous prime is 1257252317. The next prime is 1257252383. The reversal of 1257252359 is 9532527521.

It is a de Polignac number, because none of the positive numbers 2^k-1257252359 is a prime.

It is a super-2 number, since 2×1257252359² = 3161366988422129762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257242359) 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 15 ways as a sum of consecutive naturals, for example, 131462 + ... + 140700.

It is an arithmetic number, because the mean of its divisors is an integer number (87318000).

Almost surely, 2^1257252359 is an apocalyptic number.

1257252359 is a deficient number, since it is larger than the sum of its proper divisors (139835641).

1257252359 is a wasteful number, since it uses less digits than its factorization.

1257252359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9478.

The product of its digits is 189000, while the sum is 41.

The square root of 1257252359 is about 35457.7545679362. The cubic root of 1257252359 is about 1079.2966267747.

The spelling of 1257252359 in words is "one billion, two hundred fifty-seven million, two hundred fifty-two thousand, three hundred fifty-nine".