2147915 has 24 divisors (see below), whose sum is σ = 3274992. Its totient is φ = 1337280.

The previous prime is 2147911. The next prime is 2147923. The reversal of 2147915 is 5197412.

It is not a de Polignac number, because 2147915 - 2² = 2147911 is a prime.

It is a super-2 number, since 2×2147915² = 9227077694450, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2147911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2297 + ... + 3093.

It is an arithmetic number, because the mean of its divisors is an integer number (136458).

2^2147915 is an apocalyptic number.

2147915 is a deficient number, since it is larger than the sum of its proper divisors (1127077).

2147915 is a wasteful number, since it uses less digits than its factorization.

2147915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 820 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 2147915 is about 1465.5766783079. The cubic root of 2147915 is about 129.0245531454.

The spelling of 2147915 in words is "two million, one hundred forty-seven thousand, nine hundred fifteen".