2615491 has 4 divisors (see below), whose sum is σ = 2729232. Its totient is φ = 2501752.

The previous prime is 2615477. The next prime is 2615519. The reversal of 2615491 is 1945162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1945162 = 2 ⋅972581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2615491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2615441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56836 + ... + 56881.

It is an arithmetic number, because the mean of its divisors is an integer number (682308).

2^2615491 is an apocalyptic number.

2615491 is a deficient number, since it is larger than the sum of its proper divisors (113741).

2615491 is a wasteful number, since it uses less digits than its factorization.

2615491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113740.

The product of its digits is 2160, while the sum is 28.

The square root of 2615491 is about 1617.2479710916. The cubic root of 2615491 is about 137.7794383303.

The spelling of 2615491 in words is "two million, six hundred fifteen thousand, four hundred ninety-one".