25387481 has 8 divisors (see below), whose sum is σ = 29950464. Its totient is φ = 21058560.

The previous prime is 25387471. The next prime is 25387493. The reversal of 25387481 is 18478352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25387481 - 2¹⁴ = 25371097 is a prime.

It is a super-2 number, since 2×25387481² = 1289048383050722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25387421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58280 + ... + 58713.

It is an arithmetic number, because the mean of its divisors is an integer number (3743808).

Almost surely, 2^25387481 is an apocalyptic number.

It is an amenable number.

25387481 is a deficient number, since it is larger than the sum of its proper divisors (4562983).

25387481 is a wasteful number, since it uses less digits than its factorization.

25387481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117031.

The product of its digits is 53760, while the sum is 38.

The square root of 25387481 is about 5038.5991108641. The cubic root of 25387481 is about 293.9047040243.

The spelling of 25387481 in words is "twenty-five million, three hundred eighty-seven thousand, four hundred eighty-one".