70268257 has 4 divisors (see below), whose sum is σ = 70348720. Its totient is φ = 70187796.

The previous prime is 70268249. The next prime is 70268299. The reversal of 70268257 is 75286207.

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: 75286207 = 283 ⋅266029.

It is a cyclic number.

It is not a de Polignac number, because 70268257 - 2³ = 70268249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70268057) 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, 38907 + ... + 40672.

It is an arithmetic number, because the mean of its divisors is an integer number (17587180).

Almost surely, 2^70268257 is an apocalyptic number.

It is an amenable number.

70268257 is a deficient number, since it is larger than the sum of its proper divisors (80463).

70268257 is an equidigital number, since it uses as much as digits as its factorization.

70268257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80462.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 70268257 is about 8382.6163576774. The cubic root of 70268257 is about 412.6543177747.

The spelling of 70268257 in words is "seventy million, two hundred sixty-eight thousand, two hundred fifty-seven".