25418530 has 8 divisors (see below), whose sum is σ = 45753372. Its totient is φ = 10167408.

The previous prime is 25418521. The next prime is 25418531. The reversal of 25418530 is 3581452.

It can be written as a sum of positive squares in 2 ways, for example, as 22080601 + 3337929 = 4699^2 + 1827^2 .

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

It is a super-2 number, since 2×25418530² = 1292203334721800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25418531) 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, 1270917 + ... + 1270936.

Almost surely, 2^25418530 is an apocalyptic number.

25418530 is a deficient number, since it is larger than the sum of its proper divisors (20334842).

25418530 is a wasteful number, since it uses less digits than its factorization.

25418530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541860.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 25418530 is about 5041.6792837308. The cubic root of 25418530 is about 294.0244707908.

Adding to 25418530 its reverse (3581452), we get a palindrome (28999982).

The spelling of 25418530 in words is "twenty-five million, four hundred eighteen thousand, five hundred thirty".