2815961 has 4 divisors (see below), whose sum is σ = 2826624. Its totient is φ = 2805300.

The previous prime is 2815937. The next prime is 2815963. The reversal of 2815961 is 1695182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2815961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2815963) 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, 4925 + ... + 5466.

It is an arithmetic number, because the mean of its divisors is an integer number (706656).

2^2815961 is an apocalyptic number.

It is an amenable number.

2815961 is a deficient number, since it is larger than the sum of its proper divisors (10663).

2815961 is a wasteful number, since it uses less digits than its factorization.

2815961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10662.

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

The square root of 2815961 is about 1678.0825367067. The cubic root of 2815961 is about 141.2132814991.

The spelling of 2815961 in words is "two million, eight hundred fifteen thousand, nine hundred sixty-one".