3957651 has 12 divisors (see below), whose sum is σ = 6053112. Its totient is φ = 2483136.

The previous prime is 3957647. The next prime is 3957671. The reversal of 3957651 is 1567593.

It is a happy number.

3957651 is a `hidden beast` number, since 39 + 576 + 51 = 666.

It is not a de Polignac number, because 3957651 - 2² = 3957647 is a prime.

3957651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3957671) 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, 12781 + ... + 13086.

It is an arithmetic number, because the mean of its divisors is an integer number (504426).

Almost surely, 2^3957651 is an apocalyptic number.

3957651 is a deficient number, since it is larger than the sum of its proper divisors (2095461).

3957651 is a wasteful number, since it uses less digits than its factorization.

3957651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25890 (or 25887 counting only the distinct ones).

The product of its digits is 28350, while the sum is 36.

The square root of 3957651 is about 1989.3845782050. The cubic root of 3957651 is about 158.1779094087.

The spelling of 3957651 in words is "three million, nine hundred fifty-seven thousand, six hundred fifty-one".