25281725 has 24 divisors (see below), whose sum is σ = 36336960. Its totient is φ = 17089920.

The previous prime is 25281719. The next prime is 25281727. The reversal of 25281725 is 52718252.

It is a happy number.

It is not a de Polignac number, because 25281725 - 2⁶ = 25281661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25281691 and 25281700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25281727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11786 + ... + 13764.

It is an arithmetic number, because the mean of its divisors is an integer number (1514040).

Almost surely, 2^25281725 is an apocalyptic number.

25281725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25281725 is a deficient number, since it is larger than the sum of its proper divisors (11055235).

25281725 is a wasteful number, since it uses less digits than its factorization.

25281725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2064 counting only the distinct ones).

The product of its digits is 11200, while the sum is 32.

The square root of 25281725 is about 5028.0935751038. The cubic root of 25281725 is about 293.4960321876.

Adding to 25281725 its reverse (52718252), we get a palindrome (77999977).

The spelling of 25281725 in words is "twenty-five million, two hundred eighty-one thousand, seven hundred twenty-five".