25566541 has 16 divisors (see below), whose sum is σ = 34328448. Its totient is φ = 18388800.

The previous prime is 25566523. The next prime is 25566559. The reversal of 25566541 is 14566552.

It is an interprime number because it is at equal distance from previous prime (25566523) and next prime (25566559).

It is a cyclic number.

It is not a de Polignac number, because 25566541 - 2¹⁵ = 25533773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25566497 and 25566506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25566641) 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, 11770 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (2145528).

Almost surely, 2^25566541 is an apocalyptic number.

It is an amenable number.

25566541 is a deficient number, since it is larger than the sum of its proper divisors (8761907).

25566541 is a wasteful number, since it uses less digits than its factorization.

25566541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25572.

The product of its digits is 36000, while the sum is 34.

The square root of 25566541 is about 5056.3367174270. The cubic root of 25566541 is about 294.5940639010.

The spelling of 25566541 in words is "twenty-five million, five hundred sixty-six thousand, five hundred forty-one".