4651242921 has 24 divisors (see below), whose sum is σ = 7616073920. Its totient is φ = 2711654496.

The previous prime is 4651242889. The next prime is 4651242929. The reversal of 4651242921 is 1292421564.

It is a happy number.

It is not a de Polignac number, because 4651242921 - 2⁵ = 4651242889 is a prime.

It is a super-2 number, since 2×4651242921² = 43268121420305224482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4651242929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1043941 + ... + 1048386.

Almost surely, 2^4651242921 is an apocalyptic number.

It is an amenable number.

4651242921 is a deficient number, since it is larger than the sum of its proper divisors (2964830999).

4651242921 is a wasteful number, since it uses less digits than its factorization.

4651242921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092365 (or 2092362 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 4651242921 is about 68200.0214149526. The cubic root of 4651242921 is about 1669.2562360256.

The spelling of 4651242921 in words is "four billion, six hundred fifty-one million, two hundred forty-two thousand, nine hundred twenty-one".