25474145 has 4 divisors (see below), whose sum is σ = 30568980. Its totient is φ = 20379312.

The previous prime is 25474051. The next prime is 25474147. The reversal of 25474145 is 54147452.

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 8958049 + 16516096 = 2993^2 + 4064^2 .

It is a cyclic number.

It is not a de Polignac number, because 25474145 - 2¹⁶ = 25408609 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25474147) 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, 2547410 + ... + 2547419.

It is an arithmetic number, because the mean of its divisors is an integer number (7642245).

Almost surely, 2^25474145 is an apocalyptic number.

It is an amenable number.

25474145 is a deficient number, since it is larger than the sum of its proper divisors (5094835).

25474145 is an equidigital number, since it uses as much as digits as its factorization.

25474145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094834.

The product of its digits is 22400, while the sum is 32.

The square root of 25474145 is about 5047.1917934630. The cubic root of 25474145 is about 294.2387535653.

The spelling of 25474145 in words is "twenty-five million, four hundred seventy-four thousand, one hundred forty-five".