2139544 has 32 divisors (see below), whose sum is σ = 4490640. Its totient is φ = 947200.

The previous prime is 2139541. The next prime is 2139563. The reversal of 2139544 is 4459312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139541) 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, 3312 + ... + 3904.

2^2139544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2245320).

2139544 is an abundant number, since it is smaller than the sum of its proper divisors (2351096).

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

2139544 is a wasteful number, since it uses less digits than its factorization.

2139544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 647 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 2139544 is about 1462.7180179378. The cubic root of 2139544 is about 128.8567205139.

The spelling of 2139544 in words is "two million, one hundred thirty-nine thousand, five hundred forty-four".