25240069 has 4 divisors (see below), whose sum is σ = 25304044. Its totient is φ = 25176096.

The previous prime is 25240067. The next prime is 25240091. The reversal of 25240069 is 96004252.

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 21390625 + 3849444 = 4625^2 + 1962^2 .

It is a cyclic number.

It is not a de Polignac number, because 25240069 - 2¹ = 25240067 is a prime.

It is a super-2 number, since 2×25240069² = 1274122166249522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25240067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31392 + ... + 32185.

It is an arithmetic number, because the mean of its divisors is an integer number (6326011).

Almost surely, 2^25240069 is an apocalyptic number.

It is an amenable number.

25240069 is a deficient number, since it is larger than the sum of its proper divisors (63975).

25240069 is an equidigital number, since it uses as much as digits as its factorization.

25240069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63974.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 25240069 is about 5023.9495419441. The cubic root of 25240069 is about 293.3347484723.

The spelling of 25240069 in words is "twenty-five million, two hundred forty thousand, sixty-nine".