70755021 has 6 divisors (see below), whose sum is σ = 102201710. Its totient is φ = 47170008.

The previous prime is 70755019. The next prime is 70755023. The reversal of 70755021 is 12055707.

It is an interprime number because it is at equal distance from previous prime (70755019) and next prime (70755023).

It can be written as a sum of positive squares in only one way, i.e., 65853225 + 4901796 = 8115^2 + 2214^2 .

It is not a de Polignac number, because 70755021 - 2¹ = 70755019 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 (70755023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3930826 + ... + 3930843.

Almost surely, 2^70755021 is an apocalyptic number.

It is an amenable number.

70755021 is a deficient number, since it is larger than the sum of its proper divisors (31446689).

70755021 is a wasteful number, since it uses less digits than its factorization.

70755021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861675 (or 7861672 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 70755021 is about 8411.6003828047. The cubic root of 70755021 is about 413.6049757185.

The spelling of 70755021 in words is "seventy million, seven hundred fifty-five thousand, twenty-one".