25552401 has 16 divisors (see below), whose sum is σ = 40194048. Its totient is φ = 14130000.

The previous prime is 25552399. The next prime is 25552427. The reversal of 25552401 is 10425552.

It is a happy number.

It is not a de Polignac number, because 25552401 - 2¹ = 25552399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25552441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18975 + ... + 20276.

It is an arithmetic number, because the mean of its divisors is an integer number (2512128).

Almost surely, 2^25552401 is an apocalyptic number.

25552401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25552401 is a deficient number, since it is larger than the sum of its proper divisors (14641647).

25552401 is a wasteful number, since it uses less digits than its factorization.

25552401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39292.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 25552401 is about 5054.9382785549. The cubic root of 25552401 is about 294.5397438394.

Adding to 25552401 its reverse (10425552), we get a palindrome (35977953).

The spelling of 25552401 in words is "twenty-five million, five hundred fifty-two thousand, four hundred one".