25528401 has 6 divisors (see below), whose sum is σ = 36874370. Its totient is φ = 17018928.

The previous prime is 25528387. The next prime is 25528411. The reversal of 25528401 is 10482552.

It is a happy number.

25528401 is a `hidden beast` number, since 255 + 2 + 8 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 518400 = 5001^2 + 720^2 .

It is not a de Polignac number, because 25528401 - 2¹⁰ = 25527377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25528411) 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, 1418236 + ... + 1418253.

Almost surely, 2^25528401 is an apocalyptic number.

It is an amenable number.

25528401 is a deficient number, since it is larger than the sum of its proper divisors (11345969).

25528401 is a wasteful number, since it uses less digits than its factorization.

25528401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836495 (or 2836492 counting only the distinct ones).

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

The square root of 25528401 is about 5052.5638046441. The cubic root of 25528401 is about 294.4474998246.

The spelling of 25528401 in words is "twenty-five million, five hundred twenty-eight thousand, four hundred one".