25416381 has 4 divisors (see below), whose sum is σ = 33888512. Its totient is φ = 16944252.

The previous prime is 25416379. The next prime is 25416407. The reversal of 25416381 is 18361452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25416381 - 2¹ = 25416379 is a prime.

It is a super-2 number, since 2×25416381² = 1291984846274322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25416341) 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, 4236061 + ... + 4236066.

It is an arithmetic number, because the mean of its divisors is an integer number (8472128).

Almost surely, 2^25416381 is an apocalyptic number.

It is an amenable number.

25416381 is a deficient number, since it is larger than the sum of its proper divisors (8472131).

25416381 is an equidigital number, since it uses as much as digits as its factorization.

25416381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8472130.

The product of its digits is 5760, while the sum is 30.

The square root of 25416381 is about 5041.4661557924. The cubic root of 25416381 is about 294.0161844948.

The spelling of 25416381 in words is "twenty-five million, four hundred sixteen thousand, three hundred eighty-one".