2499521 has 2 divisors, whose sum is σ = 2499522. Its totient is φ = 2499520.

The previous prime is 2499517. The next prime is 2499551. The reversal of 2499521 is 1259942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 703921 = 1340^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 2499521 - 2² = 2499517 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2499551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249760 + 1249761.

It is an arithmetic number, because the mean of its divisors is an integer number (1249761).

2^2499521 is an apocalyptic number.

It is an amenable number.

2499521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2499521 is an equidigital number, since it uses as much as digits as its factorization.

2499521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 2499521 is about 1580.9873497280. The cubic root of 2499521 is about 135.7122122358.

The spelling of 2499521 in words is "two million, four hundred ninety-nine thousand, five hundred twenty-one".