25221460 has 24 divisors (see below), whose sum is σ = 57780576. Its totient is φ = 9171360.

The previous prime is 25221419. The next prime is 25221467. The reversal of 25221460 is 6412252.

It is a super-2 number, since 2×25221460² = 1272244089063200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221467) 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, 57102 + ... + 57541.

It is an arithmetic number, because the mean of its divisors is an integer number (2407524).

Almost surely, 2^25221460 is an apocalyptic number.

25221460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25221460 is an abundant number, since it is smaller than the sum of its proper divisors (32559116).

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

25221460 is a wasteful number, since it uses less digits than its factorization.

25221460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114663 (or 114661 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 25221460 is about 5022.0971715012. The cubic root of 25221460 is about 293.2626407929.

It can be divided in two parts, 252 and 21460, that added together give a palindrome (21712).

The spelling of 25221460 in words is "twenty-five million, two hundred twenty-one thousand, four hundred sixty".