64602021 has 12 divisors (see below), whose sum is σ = 94678976. Its totient is φ = 39152520.

The previous prime is 64602001. The next prime is 64602059. The reversal of 64602021 is 12020646.

It is a happy number.

It is not a de Polignac number, because 64602021 - 2¹¹ = 64599973 is a prime.

It is a super-2 number, since 2×64602021² = 8346842234568882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64602001) 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, 88621 + ... + 89346.

Almost surely, 2^64602021 is an apocalyptic number.

It is an amenable number.

64602021 is a deficient number, since it is larger than the sum of its proper divisors (30076955).

64602021 is a wasteful number, since it uses less digits than its factorization.

64602021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177992 (or 177981 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 64602021 is about 8037.5382425218. The cubic root of 64602021 is about 401.2502982306.

Adding to 64602021 its reverse (12020646), we get a palindrome (76622667).

The spelling of 64602021 in words is "sixty-four million, six hundred two thousand, twenty-one".