25138573 has 2 divisors, whose sum is σ = 25138574. Its totient is φ = 25138572.

The previous prime is 25138571. The next prime is 25138583. The reversal of 25138573 is 37583152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22867524 + 2271049 = 4782^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 25138573 - 2¹ = 25138571 is a prime.

Together with 25138571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25138571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569286 + 12569287.

It is an arithmetic number, because the mean of its divisors is an integer number (12569287).

Almost surely, 2^25138573 is an apocalyptic number.

It is an amenable number.

25138573 is a deficient number, since it is larger than the sum of its proper divisors (1).

25138573 is an equidigital number, since it uses as much as digits as its factorization.

25138573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 25138573 is about 5013.8381505589. The cubic root of 25138573 is about 292.9410319037.

The spelling of 25138573 in words is "twenty-five million, one hundred thirty-eight thousand, five hundred seventy-three".