4256652021 has 32 divisors (see below), whose sum is σ = 6078385152. Its totient is φ = 2643104640.

The previous prime is 4256652019. The next prime is 4256652047. The reversal of 4256652021 is 1202566524.

It is not a de Polignac number, because 4256652021 - 2¹ = 4256652019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256652011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1931106 + ... + 1933308.

It is an arithmetic number, because the mean of its divisors is an integer number (189949536).

Almost surely, 2^4256652021 is an apocalyptic number.

4256652021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4256652021 is a deficient number, since it is larger than the sum of its proper divisors (1821733131).

4256652021 is a wasteful number, since it uses less digits than its factorization.

4256652021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 4256652021 is about 65243.0227763858. The cubic root of 4256652021 is about 1620.6505568073.

The spelling of 4256652021 in words is "four billion, two hundred fifty-six million, six hundred fifty-two thousand, twenty-one".