2575921 has 2 divisors, whose sum is σ = 2575922.
Its totient is φ = 2575920.
The previous prime is 2575919. The next prime is 2575933. The reversal of 2575921 is 1295752.
2575921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1354896 + 1221025 = 1164^2 + 1105^2
It is a cyclic number.
It is not a de Polignac number, because 2575921 - 21 = 2575919 is a prime.
Together with 2575919, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (2575901) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1287960 + 1287961.
It is an arithmetic number, because the mean of its divisors is an integer number (1287961).
22575921 is an apocalyptic number.
It is an amenable number.
2575921 is a deficient number, since it is larger than the sum of its proper divisors (1).
2575921 is an equidigital number, since it uses as much as digits as its factorization.
2575921 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 6300, while the sum is 31.
The square root of 2575921 is about 1604.9676009191.
The cubic root of 2575921 is about 137.0810786875.
The spelling of 2575921 in words is "two million, five hundred seventy-five thousand, nine hundred twenty-one".