1253625657 has 8 divisors (see below), whose sum is σ = 1671725376. Its totient is φ = 835638192.

The previous prime is 1253625631. The next prime is 1253625671. The reversal of 1253625657 is 7565263521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253625657 - 2¹⁸ = 1253363513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253626657) 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 7 ways as a sum of consecutive naturals, for example, 2868 + ... + 50154.

It is an arithmetic number, because the mean of its divisors is an integer number (208965672).

Almost surely, 2^1253625657 is an apocalyptic number.

It is an amenable number.

1253625657 is a deficient number, since it is larger than the sum of its proper divisors (418099719).

1253625657 is an equidigital number, since it uses as much as digits as its factorization.

1253625657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56127.

The product of its digits is 378000, while the sum is 42.

The square root of 1253625657 is about 35406.5764653969. The cubic root of 1253625657 is about 1078.2578384994.

The spelling of 1253625657 in words is "one billion, two hundred fifty-three million, six hundred twenty-five thousand, six hundred fifty-seven".