25214420 has 72 divisors (see below), whose sum is σ = 67223520. Its totient is φ = 7855680.

The previous prime is 25214401. The next prime is 25214447. The reversal of 25214420 is 2441252.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25214392 and 25214401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9611 + ... + 11949.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^25214420 is an apocalyptic number.

25214420 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 25214420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33611760).

25214420 is an abundant number, since it is smaller than the sum of its proper divisors (42009100).

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

25214420 is a wasteful number, since it uses less digits than its factorization.

25214420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 25214420 is about 5021.3962201762. The cubic root of 25214420 is about 293.2353523765.

Adding to 25214420 its reverse (2441252), we get a palindrome (27655672).

The spelling of 25214420 in words is "twenty-five million, two hundred fourteen thousand, four hundred twenty".