25401225 has 12 divisors (see below), whose sum is σ = 41996816. Its totient is φ = 13547280.

The previous prime is 25401221. The next prime is 25401227. The reversal of 25401225 is 52210452.

It is a happy number.

It is not a de Polignac number, because 25401225 - 2² = 25401221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25401221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169267 + ... + 169416.

Almost surely, 2^25401225 is an apocalyptic number.

25401225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25401225 is a deficient number, since it is larger than the sum of its proper divisors (16595591).

25401225 is a wasteful number, since it uses less digits than its factorization.

25401225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338696 (or 338691 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25401225 is about 5039.9627974817. The cubic root of 25401225 is about 293.9577314401.

Adding to 25401225 its reverse (52210452), we get a palindrome (77611677).

The spelling of 25401225 in words is "twenty-five million, four hundred one thousand, two hundred twenty-five".