70404921 has 6 divisors (see below), whose sum is σ = 101696010. Its totient is φ = 46936608.

The previous prime is 70404883. The next prime is 70404931. The reversal of 70404921 is 12940407.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66243321 + 4161600 = 8139^2 + 2040^2 .

It is not a de Polignac number, because 70404921 - 2¹⁴ = 70388537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70404931) 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, 3911376 + ... + 3911393.

It is an arithmetic number, because the mean of its divisors is an integer number (16949335).

Almost surely, 2^70404921 is an apocalyptic number.

It is an amenable number.

70404921 is a deficient number, since it is larger than the sum of its proper divisors (31291089).

70404921 is a wasteful number, since it uses less digits than its factorization.

70404921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822775 (or 7822772 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 70404921 is about 8390.7640295744. The cubic root of 70404921 is about 412.9216668873.

The spelling of 70404921 in words is "seventy million, four hundred four thousand, nine hundred twenty-one".