25401065 has 4 divisors (see below), whose sum is σ = 30481284. Its totient is φ = 20320848.

The previous prime is 25401053. The next prime is 25401091. The reversal of 25401065 is 56010452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10778089 + 14622976 = 3283^2 + 3824^2 .

It is a cyclic number.

It is not a de Polignac number, because 25401065 - 2⁶ = 25401001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25401065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540102 + ... + 2540111.

It is an arithmetic number, because the mean of its divisors is an integer number (7620321).

Almost surely, 2^25401065 is an apocalyptic number.

It is an amenable number.

25401065 is a deficient number, since it is larger than the sum of its proper divisors (5080219).

25401065 is an equidigital number, since it uses as much as digits as its factorization.

25401065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080218.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25401065 is about 5039.9469243237. The cubic root of 25401065 is about 293.9571142345.

The spelling of 25401065 in words is "twenty-five million, four hundred one thousand, sixty-five".