2499965 has 8 divisors (see below), whose sum is σ = 3230808. Its totient is φ = 1846080.

The previous prime is 2499953. The next prime is 2499967. The reversal of 2499965 is 5699942.

2499965 = 69² + 70² + ... + 198².

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 2493241 = 82^2 + 1579^2 .

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

It is not a de Polignac number, because 2499965 - 2⁴ = 2499949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19166 + ... + 19295.

It is an arithmetic number, because the mean of its divisors is an integer number (403851).

2^2499965 is an apocalyptic number.

It is an amenable number.

2499965 is a deficient number, since it is larger than the sum of its proper divisors (730843).

2499965 is a wasteful number, since it uses less digits than its factorization.

2499965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38479.

The product of its digits is 174960, while the sum is 44.

The square root of 2499965 is about 1581.1277620736. The cubic root of 2499965 is about 135.7202474627.

The spelling of 2499965 in words is "two million, four hundred ninety-nine thousand, nine hundred sixty-five".