25135906 has 4 divisors (see below), whose sum is σ = 37703862. Its totient is φ = 12567952.

The previous prime is 25135897. The next prime is 25135933. The reversal of 25135906 is 60953152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 3837681 = 4615^2 + 1959^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283975 + ... + 6283978.

Almost surely, 2^25135906 is an apocalyptic number.

25135906 is a deficient number, since it is larger than the sum of its proper divisors (12567956).

25135906 is a wasteful number, since it uses less digits than its factorization.

25135906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12567955.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 25135906 is about 5013.5721795941. The cubic root of 25135906 is about 292.9306719765.

The spelling of 25135906 in words is "twenty-five million, one hundred thirty-five thousand, nine hundred six".