1257725373 has 4 divisors (see below), whose sum is σ = 1676967168. Its totient is φ = 838483580.

The previous prime is 1257725347. The next prime is 1257725393. The reversal of 1257725373 is 3735277521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1257725373 - 2⁵ = 1257725341 is a prime.

It is a super-2 number, since 2×1257725373² = 3163746227775978258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257725333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209620893 + ... + 209620898.

It is an arithmetic number, because the mean of its divisors is an integer number (419241792).

Almost surely, 2^1257725373 is an apocalyptic number.

It is an amenable number.

1257725373 is a deficient number, since it is larger than the sum of its proper divisors (419241795).

1257725373 is an equidigital number, since it uses as much as digits as its factorization.

1257725373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419241794.

The product of its digits is 308700, while the sum is 42.

The square root of 1257725373 is about 35464.4240472054. The cubic root of 1257725373 is about 1079.4319638055.

It can be divided in two parts, 12577 and 25373, that added together give a triangular number (37950 = T₂₇₅).

The spelling of 1257725373 in words is "one billion, two hundred fifty-seven million, seven hundred twenty-five thousand, three hundred seventy-three".