25561534 has 8 divisors (see below), whose sum is σ = 38867760. Its totient is φ = 12605616.

The previous prime is 25561519. The next prime is 25561541. The reversal of 25561534 is 43516552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25561496 and 25561505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87394 + ... + 87685.

It is an arithmetic number, because the mean of its divisors is an integer number (4858470).

Almost surely, 2^25561534 is an apocalyptic number.

25561534 is a deficient number, since it is larger than the sum of its proper divisors (13306226).

25561534 is a wasteful number, since it uses less digits than its factorization.

25561534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175154.

The product of its digits is 18000, while the sum is 31.

The square root of 25561534 is about 5055.8415718849. The cubic root of 25561534 is about 294.5748313582.

The spelling of 25561534 in words is "twenty-five million, five hundred sixty-one thousand, five hundred thirty-four".