2515969 has 4 divisors (see below), whose sum is σ = 2521044. Its totient is φ = 2510896.

The previous prime is 2515967. The next prime is 2516021. The reversal of 2515969 is 9695152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 2433600 = 287^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515969 - 2¹ = 2515967 is a prime.

It is a super-2 number, since 2×2515969² = 12660200017922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2515967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702 + ... + 2815.

It is an arithmetic number, because the mean of its divisors is an integer number (630261).

2^2515969 is an apocalyptic number.

It is an amenable number.

2515969 is a deficient number, since it is larger than the sum of its proper divisors (5075).

2515969 is an equidigital number, since it uses as much as digits as its factorization.

2515969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074.

The product of its digits is 24300, while the sum is 37.

The square root of 2515969 is about 1586.1806328410. The cubic root of 2515969 is about 136.0092446138.

The spelling of 2515969 in words is "two million, five hundred fifteen thousand, nine hundred sixty-nine".