25542791 has 4 divisors (see below), whose sum is σ = 26366784. Its totient is φ = 24718800.

The previous prime is 25542787. The next prime is 25542841. The reversal of 25542791 is 19724552.

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

It is a cyclic number.

It is not a de Polignac number, because 25542791 - 2² = 25542787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25542091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411950 + ... + 412011.

It is an arithmetic number, because the mean of its divisors is an integer number (6591696).

Almost surely, 2^25542791 is an apocalyptic number.

25542791 is a deficient number, since it is larger than the sum of its proper divisors (823993).

25542791 is an equidigital number, since it uses as much as digits as its factorization.

25542791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823992.

The product of its digits is 25200, while the sum is 35.

The square root of 25542791 is about 5053.9876335424. The cubic root of 25542791 is about 294.5028147350.

The spelling of 25542791 in words is "twenty-five million, five hundred forty-two thousand, seven hundred ninety-one".