25451280 has 80 divisors (see below), whose sum is σ = 87672960. Its totient is φ = 6786432.

The previous prime is 25451269. The next prime is 25451281. The reversal of 25451280 is 8215452.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (25451281) 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, 3732 + ... + 8051.

It is an arithmetic number, because the mean of its divisors is an integer number (1095912).

Almost surely, 2^25451280 is an apocalyptic number.

25451280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25451280 is an abundant number, since it is smaller than the sum of its proper divisors (62221680).

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

25451280 is a wasteful number, since it uses less digits than its factorization.

25451280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11805 (or 11793 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25451280 is about 5044.9261639790. The cubic root of 25451280 is about 294.1506932594.

The spelling of 25451280 in words is "twenty-five million, four hundred fifty-one thousand, two hundred eighty".