70251157 has 4 divisors (see below), whose sum is σ = 74383596. Its totient is φ = 66118720.

The previous prime is 70251149. The next prime is 70251161. The reversal of 70251157 is 75115207.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21893041 + 48358116 = 4679^2 + 6954^2 .

It is a cyclic number.

It is not a de Polignac number, because 70251157 - 2³ = 70251149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70251127) 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, 2066194 + ... + 2066227.

It is an arithmetic number, because the mean of its divisors is an integer number (18595899).

Almost surely, 2^70251157 is an apocalyptic number.

It is an amenable number.

70251157 is a deficient number, since it is larger than the sum of its proper divisors (4132439).

70251157 is a wasteful number, since it uses less digits than its factorization.

70251157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132438.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 70251157 is about 8381.5963276693. The cubic root of 70251157 is about 412.6208414863.

The spelling of 70251157 in words is "seventy million, two hundred fifty-one thousand, one hundred fifty-seven".