25561054 has 4 divisors (see below), whose sum is σ = 38341584. Its totient is φ = 12780526.

The previous prime is 25561051. The next prime is 25561057. The reversal of 25561054 is 45016552.

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

It is an interprime number because it is at equal distance from previous prime (25561051) and next prime (25561057).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390262 + ... + 6390265.

It is an arithmetic number, because the mean of its divisors is an integer number (9585396).

Almost surely, 2^25561054 is an apocalyptic number.

25561054 is a deficient number, since it is larger than the sum of its proper divisors (12780530).

25561054 is a wasteful number, since it uses less digits than its factorization.

25561054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12780529.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 25561054 is about 5055.7941018202. The cubic root of 25561054 is about 294.5729874834.

The spelling of 25561054 in words is "twenty-five million, five hundred sixty-one thousand, fifty-four".