2536921 has 2 divisors, whose sum is σ = 2536922. Its totient is φ = 2536920.

The previous prime is 2536909. The next prime is 2536943. The reversal of 2536921 is 1296352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 741321 = 1340^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 2536921 - 2¹⁵ = 2504153 is a prime.

2536921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2536921.

It is not a weakly prime, because it can be changed into another prime (2536991) 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, 1268460 + 1268461.

It is an arithmetic number, because the mean of its divisors is an integer number (1268461).

2^2536921 is an apocalyptic number.

It is an amenable number.

2536921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2536921 is an equidigital number, since it uses as much as digits as its factorization.

2536921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 2536921 is about 1592.7714839235. The cubic root of 2536921 is about 136.3857452503.

The spelling of 2536921 in words is "two million, five hundred thirty-six thousand, nine hundred twenty-one".