25513457 has 2 divisors, whose sum is σ = 25513458. Its totient is φ = 25513456.

The previous prime is 25513451. The next prime is 25513483. The reversal of 25513457 is 75431552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22287841 + 3225616 = 4721^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 25513457 - 2⁴ = 25513441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25513451) 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, 12756728 + 12756729.

It is an arithmetic number, because the mean of its divisors is an integer number (12756729).

Almost surely, 2^25513457 is an apocalyptic number.

It is an amenable number.

25513457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25513457 is an equidigital number, since it uses as much as digits as its factorization.

25513457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 25513457 is about 5051.0847349851. The cubic root of 25513457 is about 294.3900333408.

The spelling of 25513457 in words is "twenty-five million, five hundred thirteen thousand, four hundred fifty-seven".