2139256 has 16 divisors (see below), whose sum is σ = 4584240. Its totient is φ = 916800.

The previous prime is 2139233. The next prime is 2139283. The reversal of 2139256 is 6529312.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19045 + ... + 19156.

It is an arithmetic number, because the mean of its divisors is an integer number (286515).

2^2139256 is an apocalyptic number.

It is an amenable number.

2139256 is an abundant number, since it is smaller than the sum of its proper divisors (2444984).

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

2139256 is a wasteful number, since it uses less digits than its factorization.

2139256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38214 (or 38210 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 2139256 is about 1462.6195677619. The cubic root of 2139256 is about 128.8509385340.

The spelling of 2139256 in words is "two million, one hundred thirty-nine thousand, two hundred fifty-six".