70757421 has 12 divisors (see below), whose sum is σ = 109746432. Its totient is φ = 40432728.

The previous prime is 70757413. The next prime is 70757437. The reversal of 70757421 is 12475707.

It is a happy number.

It is not a de Polignac number, because 70757421 - 2³ = 70757413 is a prime.

It is a super-2 number, since 2×70757421² = 10013225253142482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70757411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240525 + ... + 240818.

It is an arithmetic number, because the mean of its divisors is an integer number (9145536).

Almost surely, 2^70757421 is an apocalyptic number.

It is an amenable number.

70757421 is a deficient number, since it is larger than the sum of its proper divisors (38989011).

70757421 is a wasteful number, since it uses less digits than its factorization.

70757421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481360 (or 481353 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 70757421 is about 8411.7430417245. The cubic root of 70757421 is about 413.6096521392.

The spelling of 70757421 in words is "seventy million, seven hundred fifty-seven thousand, four hundred twenty-one".