1357057257 has 8 divisors (see below), whose sum is σ = 1828063776. Its totient is φ = 895377792.

The previous prime is 1357057241. The next prime is 1357057259. The reversal of 1357057257 is 7527507531.

It is a happy number.

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

It is not a de Polignac number, because 1357057257 - 2⁴ = 1357057241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1357057259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2331423 + ... + 2332004.

It is an arithmetic number, because the mean of its divisors is an integer number (228507972).

Almost surely, 2^1357057257 is an apocalyptic number.

It is an amenable number.

1357057257 is a deficient number, since it is larger than the sum of its proper divisors (471006519).

1357057257 is an equidigital number, since it uses as much as digits as its factorization.

1357057257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663527.

The product of its (nonzero) digits is 257250, while the sum is 42.

The square root of 1357057257 is about 36838.2580614230. The cubic root of 1357057257 is about 1107.1319669122.

The spelling of 1357057257 in words is "one billion, three hundred fifty-seven million, fifty-seven thousand, two hundred fifty-seven".