2139956 has 24 divisors (see below), whose sum is σ = 4609920. Its totient is φ = 846432.

The previous prime is 2139953. The next prime is 2139959. The reversal of 2139956 is 6599312.

It is an interprime number because it is at equal distance from previous prime (2139953) and next prime (2139959).

It is an Ulam number.

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 7 ways as a sum of consecutive naturals, for example, 2576 + ... + 3303.

It is an arithmetic number, because the mean of its divisors is an integer number (192080).

2^2139956 is an apocalyptic number.

2139956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2139956 is an abundant number, since it is smaller than the sum of its proper divisors (2469964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139956 is a wasteful number, since it uses less digits than its factorization.

2139956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903 (or 5901 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 2139956 is about 1462.8588448651. The cubic root of 2139956 is about 128.8649910552.

The spelling of 2139956 in words is "two million, one hundred thirty-nine thousand, nine hundred fifty-six".