25506128 has 10 divisors (see below), whose sum is σ = 49418154. Its totient is φ = 12753056.

The previous prime is 25506121. The next prime is 25506157. The reversal of 25506128 is 82160552.

It can be written as a sum of positive squares in only one way, i.e., 17372224 + 8133904 = 4168^2 + 2852^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25506128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 797051 + ... + 797082.

Almost surely, 2^25506128 is an apocalyptic number.

It is an amenable number.

25506128 is a deficient number, since it is larger than the sum of its proper divisors (23912026).

25506128 is a wasteful number, since it uses less digits than its factorization.

25506128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594141 (or 1594135 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 25506128 is about 5050.3591951464. The cubic root of 25506128 is about 294.3618417975.

The spelling of 25506128 in words is "twenty-five million, five hundred six thousand, one hundred twenty-eight".