25528739 has 2 divisors, whose sum is σ = 25528740. Its totient is φ = 25528738.

The previous prime is 25528733. The next prime is 25528753. The reversal of 25528739 is 93782552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25528739 - 2¹² = 25524643 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25528696 and 25528705.

It is not a weakly prime, because it can be changed into another prime (25528733) 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, 12764369 + 12764370.

It is an arithmetic number, because the mean of its divisors is an integer number (12764370).

Almost surely, 2^25528739 is an apocalyptic number.

25528739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25528739 is an equidigital number, since it uses as much as digits as its factorization.

25528739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 25528739 is about 5052.5972528988. The cubic root of 25528739 is about 294.4487993291.

The spelling of 25528739 in words is "twenty-five million, five hundred twenty-eight thousand, seven hundred thirty-nine".