2139560 has 32 divisors (see below), whose sum is σ = 4876200. Its totient is φ = 844800.

The previous prime is 2139541. The next prime is 2139563. The reversal of 2139560 is 659312.

It can be written as a sum of positive squares in 4 ways, for example, as 1747684 + 391876 = 1322^2 + 626^2 .

It is not an unprimeable number, because it can be changed into a prime (2139563) 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, 3260 + ... + 3860.

2^2139560 is an apocalyptic number.

2139560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438100).

2139560 is an abundant number, since it is smaller than the sum of its proper divisors (2736640).

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

2139560 is a wasteful number, since it uses less digits than its factorization.

2139560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2139560 is about 1462.7234871978. The cubic root of 2139560 is about 128.8570417198.

The spelling of 2139560 in words is "two million, one hundred thirty-nine thousand, five hundred sixty".