25449945 has 32 divisors (see below), whose sum is σ = 41904000. Its totient is φ = 13185024.

The previous prime is 25449943. The next prime is 25449947. The reversal of 25449945 is 54994452.

It is an interprime number because it is at equal distance from previous prime (25449943) and next prime (25449947).

It is not a de Polignac number, because 25449945 - 2¹ = 25449943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25449897 and 25449906.

It is not an unprimeable number, because it can be changed into a prime (25449943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131769 + ... + 131961.

It is an arithmetic number, because the mean of its divisors is an integer number (1309500).

Almost surely, 2^25449945 is an apocalyptic number.

It is an amenable number.

25449945 is a deficient number, since it is larger than the sum of its proper divisors (16454055).

25449945 is a wasteful number, since it uses less digits than its factorization.

25449945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its digits is 259200, while the sum is 42.

The square root of 25449945 is about 5044.7938510904. The cubic root of 25449945 is about 294.1455501253.

The spelling of 25449945 in words is "twenty-five million, four hundred forty-nine thousand, nine hundred forty-five".