4074020521 has 4 divisors (see below), whose sum is σ = 4251151872. Its totient is φ = 3896889172.

The previous prime is 4074020519. The next prime is 4074020549. The reversal of 4074020521 is 1250204704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4074020521 - 2¹ = 4074020519 is a prime.

It is a super-2 number, since 2×4074020521² = 33195286411058222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4074026521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88565641 + ... + 88565686.

It is an arithmetic number, because the mean of its divisors is an integer number (1062787968).

Almost surely, 2^4074020521 is an apocalyptic number.

It is an amenable number.

4074020521 is a deficient number, since it is larger than the sum of its proper divisors (177131351).

4074020521 is a wasteful number, since it uses less digits than its factorization.

4074020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177131350.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 4074020521 is about 63828.0543413318. The cubic root of 4074020521 is about 1597.1329542710.

The spelling of 4074020521 in words is "four billion, seventy-four million, twenty thousand, five hundred twenty-one".