2520399 has 16 divisors (see below), whose sum is σ = 3863808. Its totient is φ = 1431552.

The previous prime is 2520383. The next prime is 2520431. The reversal of 2520399 is 9930252.

It is not a de Polignac number, because 2520399 - 2⁴ = 2520383 is a prime.

It is a super-2 number, since 2×2520399² = 12704822238402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520319) 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 15 ways as a sum of consecutive naturals, for example, 5164 + ... + 5630.

It is an arithmetic number, because the mean of its divisors is an integer number (241488).

2^2520399 is an apocalyptic number.

2520399 is a deficient number, since it is larger than the sum of its proper divisors (1343409).

2520399 is a wasteful number, since it uses less digits than its factorization.

2520399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 2520399 is about 1587.5764548519. The cubic root of 2520399 is about 136.0890240373.

The spelling of 2520399 in words is "two million, five hundred twenty thousand, three hundred ninety-nine".