3942020257 has 12 divisors (see below), whose sum is σ = 4743741780. Its totient is φ = 3262360416.

The previous prime is 3942020239. The next prime is 3942020261. The reversal of 3942020257 is 7520202493.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 669722641 + 3272297616 = 25879^2 + 57204^2 .

It is not a de Polignac number, because 3942020257 - 2¹¹ = 3942018209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3942020057) 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, 1385638 + ... + 1388479.

It is an arithmetic number, because the mean of its divisors is an integer number (395311815).

Almost surely, 2^3942020257 is an apocalyptic number.

It is an amenable number.

3942020257 is a deficient number, since it is larger than the sum of its proper divisors (801721523).

3942020257 is a wasteful number, since it uses less digits than its factorization.

3942020257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774160 (or 2774153 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 3942020257 is about 62785.5099286452. The cubic root of 3942020257 is about 1579.6939343326.

The spelling of 3942020257 in words is "three billion, nine hundred forty-two million, twenty thousand, two hundred fifty-seven".