2521307 has 2 divisors, whose sum is σ = 2521308. Its totient is φ = 2521306.

The previous prime is 2521297. The next prime is 2521327. The reversal of 2521307 is 7031252.

It is an a-pointer prime, because the next prime (2521327) can be obtained adding 2521307 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2521307 - 2¹⁰ = 2520283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2521327) 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 as a sum of consecutive naturals, namely, 1260653 + 1260654.

It is an arithmetic number, because the mean of its divisors is an integer number (1260654).

2^2521307 is an apocalyptic number.

2521307 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521307 is an equidigital number, since it uses as much as digits as its factorization.

2521307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2521307 is about 1587.8623995800. The cubic root of 2521307 is about 136.1053645714.

Adding to 2521307 its reverse (7031252), we get a palindrome (9552559).

The spelling of 2521307 in words is "two million, five hundred twenty-one thousand, three hundred seven".