25135541 has 2 divisors, whose sum is σ = 25135542. Its totient is φ = 25135540.

The previous prime is 25135529. The next prime is 25135559. The reversal of 25135541 is 14553152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13032100 + 12103441 = 3610^2 + 3479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25135541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25135541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25135241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12567770 + 12567771.

It is an arithmetic number, because the mean of its divisors is an integer number (12567771).

Almost surely, 2^25135541 is an apocalyptic number.

It is an amenable number.

25135541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25135541 is an equidigital number, since it uses as much as digits as its factorization.

25135541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 26.

The square root of 25135541 is about 5013.5357782707. The cubic root of 25135541 is about 292.9292540817.

Adding to 25135541 its reverse (14553152), we get a palindrome (39688693).

The spelling of 25135541 in words is "twenty-five million, one hundred thirty-five thousand, five hundred forty-one".