2615961 has 4 divisors (see below), whose sum is σ = 3487952. Its totient is φ = 1743972.

The previous prime is 2615959. The next prime is 2615969. The reversal of 2615961 is 1695162.

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 not a de Polignac number, because 2615961 - 2¹ = 2615959 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

2615961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2615969) 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 3 ways as a sum of consecutive naturals, for example, 435991 + ... + 435996.

It is an arithmetic number, because the mean of its divisors is an integer number (871988).

2^2615961 is an apocalyptic number.

It is an amenable number.

2615961 is a deficient number, since it is larger than the sum of its proper divisors (871991).

2615961 is an equidigital number, since it uses as much as digits as its factorization.

2615961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871990.

The product of its digits is 3240, while the sum is 30.

The square root of 2615961 is about 1617.3932731405. The cubic root of 2615961 is about 137.7876907588.

The spelling of 2615961 in words is "two million, six hundred fifteen thousand, nine hundred sixty-one".