25940069 has 4 divisors (see below), whose sum is σ = 25990380. Its totient is φ = 25889760.

The previous prime is 25940059. The next prime is 25940081. The reversal of 25940069 is 96004952.

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 6315169 + 19624900 = 2513^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 25940069 - 2⁴ = 25940053 is a prime.

It is a super-2 number, since 2×25940069² = 1345774359449522, 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 (25940059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24374 + ... + 25415.

It is an arithmetic number, because the mean of its divisors is an integer number (6497595).

Almost surely, 2^25940069 is an apocalyptic number.

It is an amenable number.

25940069 is a deficient number, since it is larger than the sum of its proper divisors (50311).

25940069 is an equidigital number, since it uses as much as digits as its factorization.

25940069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50310.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 25940069 is about 5093.1394051214. The cubic root of 25940069 is about 296.0218094778.

The spelling of 25940069 in words is "twenty-five million, nine hundred forty thousand, sixty-nine".