25421772 has 48 divisors (see below), whose sum is σ = 63916160. Its totient is φ = 7838208.

The previous prime is 25421771. The next prime is 25421779. The reversal of 25421772 is 27712452.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25421771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8508 + ... + 11100.

Almost surely, 2^25421772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25421772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31958080).

25421772 is an abundant number, since it is smaller than the sum of its proper divisors (38494388).

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

25421772 is a wasteful number, since it uses less digits than its factorization.

25421772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662 (or 2660 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 25421772 is about 5042.0007933359. Note that the first 3 decimals coincide. The cubic root of 25421772 is about 294.0369706851.

The spelling of 25421772 in words is "twenty-five million, four hundred twenty-one thousand, seven hundred seventy-two".