2615891 has 8 divisors (see below), whose sum is σ = 2676960. Its totient is φ = 2555712.

The previous prime is 2615869. The next prime is 2615897. The reversal of 2615891 is 1985162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2615891 - 2⁶ = 2615827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2615897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11111 + ... + 11343.

It is an arithmetic number, because the mean of its divisors is an integer number (334620).

2^2615891 is an apocalyptic number.

2615891 is a deficient number, since it is larger than the sum of its proper divisors (61069).

2615891 is a wasteful number, since it uses less digits than its factorization.

2615891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its digits is 4320, while the sum is 32.

The square root of 2615891 is about 1617.3716332371. The cubic root of 2615891 is about 137.7864617363.

The spelling of 2615891 in words is "two million, six hundred fifteen thousand, eight hundred ninety-one".