70361257 has 4 divisors (see below), whose sum is σ = 71044480. Its totient is φ = 69678036.

The previous prime is 70361251. The next prime is 70361261. The reversal of 70361257 is 75216307.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75216307 = 19 ⋅3958753.

It is a cyclic number.

It is not a de Polignac number, because 70361257 - 2⁷ = 70361129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70361251) 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, 341457 + ... + 341662.

It is an arithmetic number, because the mean of its divisors is an integer number (17761120).

Almost surely, 2^70361257 is an apocalyptic number.

It is an amenable number.

70361257 is a deficient number, since it is larger than the sum of its proper divisors (683223).

70361257 is a wasteful number, since it uses less digits than its factorization.

70361257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683222.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 70361257 is about 8388.1617175636. The cubic root of 70361257 is about 412.8362867748.

The spelling of 70361257 in words is "seventy million, three hundred sixty-one thousand, two hundred fifty-seven".