25265389 has 4 divisors (see below), whose sum is σ = 25881660. Its totient is φ = 24649120.

The previous prime is 25265377. The next prime is 25265411. The reversal of 25265389 is 98356252.

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 15342889 + 9922500 = 3917^2 + 3150^2 .

It is a cyclic number.

It is not a de Polignac number, because 25265389 - 2¹⁵ = 25232621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25265309) 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 3 ways as a sum of consecutive naturals, for example, 308074 + ... + 308155.

It is an arithmetic number, because the mean of its divisors is an integer number (6470415).

Almost surely, 2^25265389 is an apocalyptic number.

It is an amenable number.

25265389 is a deficient number, since it is larger than the sum of its proper divisors (616271).

25265389 is an equidigital number, since it uses as much as digits as its factorization.

25265389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616270.

The product of its digits is 129600, while the sum is 40.

The square root of 25265389 is about 5026.4688400506. The cubic root of 25265389 is about 293.4328035876.

The spelling of 25265389 in words is "twenty-five million, two hundred sixty-five thousand, three hundred eighty-nine".