25454520 has 384 divisors, whose sum is σ = 109166400. Its totient is φ = 5225472.

The previous prime is 25454501. The next prime is 25454521. The reversal of 25454520 is 2545452.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25454521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 687942 + ... + 687978.

Almost surely, 2^25454520 is an apocalyptic number.

25454520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25454520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54583200).

25454520 is an abundant number, since it is smaller than the sum of its proper divisors (83711880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25454520 is a wasteful number, since it uses less digits than its factorization.

25454520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 25454520 is about 5045.2472684696. The cubic root of 25454520 is about 294.1631747248.

Adding to 25454520 its reverse (2545452), we get a palindrome (27999972).

The spelling of 25454520 in words is "twenty-five million, four hundred fifty-four thousand, five hundred twenty".