3942458521 has 9 divisors (see below), whose sum is σ = 4054280349. Its totient is φ = 3833645184.

The previous prime is 3942458503. The next prime is 3942458537. The reversal of 3942458521 is 1258542493.

The square root of 3942458521 is 62789.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2952726921 + 989731600 = 54339^2 + 31460^2 .

It is not a de Polignac number, because 3942458521 - 2⁵ = 3942458489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3942458501) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2322345 + ... + 2324041.

Almost surely, 2^3942458521 is an apocalyptic number.

3942458521 is the 62789-th square number.

3942458521 is the 31395-th centered octagonal number.

It is an amenable number.

3942458521 is a deficient number, since it is larger than the sum of its proper divisors (111821828).

3942458521 is an frugal number, since it uses more digits than its factorization.

3942458521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 1734 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The cubic root of 3942458521 is about 1579.7524743097.

The spelling of 3942458521 in words is "three billion, nine hundred forty-two million, four hundred fifty-eight thousand, five hundred twenty-one".