25121465 has 4 divisors (see below), whose sum is σ = 30145764. Its totient is φ = 20097168.

The previous prime is 25121443. The next prime is 25121471. The reversal of 25121465 is 56412152.

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 14830201 + 10291264 = 3851^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121465 - 2⁸ = 25121209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2512142 + ... + 2512151.

It is an arithmetic number, because the mean of its divisors is an integer number (7536441).

Almost surely, 2^25121465 is an apocalyptic number.

It is an amenable number.

25121465 is a deficient number, since it is larger than the sum of its proper divisors (5024299).

25121465 is an equidigital number, since it uses as much as digits as its factorization.

25121465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024298.

The product of its digits is 2400, while the sum is 26.

The square root of 25121465 is about 5012.1317819866. The cubic root of 25121465 is about 292.8745633670.

The spelling of 25121465 in words is "twenty-five million, one hundred twenty-one thousand, four hundred sixty-five".