34656021 has 12 divisors (see below), whose sum is σ = 50179948. Its totient is φ = 23048064.

The previous prime is 34656001. The next prime is 34656053. The reversal of 34656021 is 12065643.

34656021 is a `hidden beast` number, since 3 + 4 + 656 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4284900 + 30371121 = 2070^2 + 5511^2 .

It is not a de Polignac number, because 34656021 - 2⁵ = 34655989 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 (34656001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 550 + ... + 8343.

Almost surely, 2^34656021 is an apocalyptic number.

It is an amenable number.

34656021 is a deficient number, since it is larger than the sum of its proper divisors (15523927).

34656021 is a wasteful number, since it uses less digits than its factorization.

34656021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9332 (or 9329 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 34656021 is about 5886.9364698458. The cubic root of 34656021 is about 326.0315029714.

The spelling of 34656021 in words is "thirty-four million, six hundred fifty-six thousand, twenty-one".