25556542 has 32 divisors (see below), whose sum is σ = 46220544. Its totient is φ = 10454400.

The previous prime is 25556537. The next prime is 25556543. The reversal of 25556542 is 24565552.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 25556498 and 25556507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25556543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7117 + ... + 10087.

It is an arithmetic number, because the mean of its divisors is an integer number (1444392).

Almost surely, 2^25556542 is an apocalyptic number.

25556542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25556542 is a deficient number, since it is larger than the sum of its proper divisors (20664002).

25556542 is a wasteful number, since it uses less digits than its factorization.

25556542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its digits is 60000, while the sum is 34.

The square root of 25556542 is about 5055.3478614236. The cubic root of 25556542 is about 294.5556539320. Note that the first 3 decimals are identical.

The spelling of 25556542 in words is "twenty-five million, five hundred fifty-six thousand, five hundred forty-two".