25629401 has 6 divisors (see below), whose sum is σ = 29813850. Its totient is φ = 21968016.

The previous prime is 25629397. The next prime is 25629407. The reversal of 25629401 is 10492652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22992025 + 2637376 = 4795^2 + 1624^2 .

It is not a de Polignac number, because 25629401 - 2² = 25629397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25629407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261476 + ... + 261573.

It is an arithmetic number, because the mean of its divisors is an integer number (4968975).

Almost surely, 2^25629401 is an apocalyptic number.

It is an amenable number.

25629401 is a deficient number, since it is larger than the sum of its proper divisors (4184449).

25629401 is an equidigital number, since it uses as much as digits as its factorization.

25629401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523063 (or 523056 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 25629401 is about 5062.5488639617. The cubic root of 25629401 is about 294.8353040278.

The spelling of 25629401 in words is "twenty-five million, six hundred twenty-nine thousand, four hundred one".