70021236 has 12 divisors (see below), whose sum is σ = 163382912. Its totient is φ = 23340408.

The previous prime is 70021187. The next prime is 70021271. The reversal of 70021236 is 63212007.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917540 + ... + 2917563.

Almost surely, 2^70021236 is an apocalyptic number.

It is an amenable number.

70021236 is an abundant number, since it is smaller than the sum of its proper divisors (93361676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70021236 is a wasteful number, since it uses less digits than its factorization.

70021236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835110 (or 5835108 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 70021236 is about 8367.8692628410. The cubic root of 70021236 is about 412.1702017741.

The spelling of 70021236 in words is "seventy million, twenty-one thousand, two hundred thirty-six".