25542487 has 4 divisors (see below), whose sum is σ = 25705336. Its totient is φ = 25379640.

The previous prime is 25542437. The next prime is 25542493. The reversal of 25542487 is 78424552.

It is a happy number.

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 25542487 - 2¹⁵ = 25509719 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 (25542437) 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, 81189 + ... + 81502.

It is an arithmetic number, because the mean of its divisors is an integer number (6426334).

Almost surely, 2^25542487 is an apocalyptic number.

25542487 is a deficient number, since it is larger than the sum of its proper divisors (162849).

25542487 is a wasteful number, since it uses less digits than its factorization.

25542487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162848.

The product of its digits is 89600, while the sum is 37.

The square root of 25542487 is about 5053.9575581914. The cubic root of 25542487 is about 294.5016463791.

It can be divided in two parts, 2554 and 2487, that added together give a square (5041 = 71²).

The spelling of 25542487 in words is "twenty-five million, five hundred forty-two thousand, four hundred eighty-seven".