2139957 has 12 divisors (see below), whose sum is σ = 3157440. Its totient is φ = 1396008.

The previous prime is 2139953. The next prime is 2139959. The reversal of 2139957 is 7599312.

It is not a de Polignac number, because 2139957 - 2² = 2139953 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139953) 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, 2107 + ... + 2952.

It is an arithmetic number, because the mean of its divisors is an integer number (263120).

2^2139957 is an apocalyptic number.

It is an amenable number.

2139957 is a deficient number, since it is larger than the sum of its proper divisors (1017483).

2139957 is a wasteful number, since it uses less digits than its factorization.

2139957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112 (or 5109 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 2139957 is about 1462.8591866615. The cubic root of 2139957 is about 128.8650111281.

The spelling of 2139957 in words is "two million, one hundred thirty-nine thousand, nine hundred fifty-seven".