2139915 has 16 divisors (see below), whose sum is σ = 3442176. Its totient is φ = 1135200.

The previous prime is 2139911. The next prime is 2139919. The reversal of 2139915 is 5199312.

It is an interprime number because it is at equal distance from previous prime (2139911) and next prime (2139919).

It is not a de Polignac number, because 2139915 - 2² = 2139911 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2139911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4750 + ... + 5180.

It is an arithmetic number, because the mean of its divisors is an integer number (215136).

2^2139915 is an apocalyptic number.

2139915 is a deficient number, since it is larger than the sum of its proper divisors (1302261).

2139915 is a wasteful number, since it uses less digits than its factorization.

2139915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770.

The product of its digits is 2430, while the sum is 30.

The square root of 2139915 is about 1462.8448311424. The cubic root of 2139915 is about 128.8641680635.

The spelling of 2139915 in words is "two million, one hundred thirty-nine thousand, nine hundred fifteen".