70257557 has 4 divisors (see below), whose sum is σ = 70524960. Its totient is φ = 69990156.

The previous prime is 70257541. The next prime is 70257569. The reversal of 70257557 is 75575207.

It is a happy number.

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 70257557 - 2⁴ = 70257541 is a prime.

It is a super-2 number, since 2×70257557² = 9872248631216498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70257557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75257557) 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, 133307 + ... + 133832.

It is an arithmetic number, because the mean of its divisors is an integer number (17631240).

Almost surely, 2^70257557 is an apocalyptic number.

It is an amenable number.

70257557 is a deficient number, since it is larger than the sum of its proper divisors (267403).

70257557 is a wasteful number, since it uses less digits than its factorization.

70257557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267402.

The product of its (nonzero) digits is 85750, while the sum is 38.

The square root of 70257557 is about 8381.9781078216. The cubic root of 70257557 is about 412.6333712595.

It can be divided in two parts, 702575 and 57, that multiplied together give a triangular number (40046775 = T₈₉₄₉).

The spelling of 70257557 in words is "seventy million, two hundred fifty-seven thousand, five hundred fifty-seven".