25716487 has 4 divisors (see below), whose sum is σ = 25956936. Its totient is φ = 25476040.

The previous prime is 25716463. The next prime is 25716499. The reversal of 25716487 is 78461752.

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 25716487 - 2¹¹ = 25714439 is a prime.

It is a super-2 number, since 2×25716487² = 1322675407242338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25716437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120064 + ... + 120277.

It is an arithmetic number, because the mean of its divisors is an integer number (6489234).

Almost surely, 2^25716487 is an apocalyptic number.

25716487 is a deficient number, since it is larger than the sum of its proper divisors (240449).

25716487 is a wasteful number, since it uses less digits than its factorization.

25716487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240448.

The product of its digits is 94080, while the sum is 40.

The square root of 25716487 is about 5071.1425734247. The cubic root of 25716487 is about 295.1688662595.

The spelling of 25716487 in words is "twenty-five million, seven hundred sixteen thousand, four hundred eighty-seven".