25745320 has 16 divisors (see below), whose sum is σ = 57927060. Its totient is φ = 10298112.

The previous prime is 25745311. The next prime is 25745329. The reversal of 25745320 is 2354752.

It is an interprime number because it is at equal distance from previous prime (25745311) and next prime (25745329).

It can be written as a sum of positive squares in 2 ways, for example, as 23367556 + 2377764 = 4834^2 + 1542^2 .

It is not an unprimeable number, because it can be changed into a prime (25745329) 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, 321777 + ... + 321856.

Almost surely, 2^25745320 is an apocalyptic number.

25745320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25745320 is an abundant number, since it is smaller than the sum of its proper divisors (32181740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25745320 is a wasteful number, since it uses less digits than its factorization.

25745320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643644 (or 643640 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 25745320 is about 5073.9846274895. The cubic root of 25745320 is about 295.2791382579.

The spelling of 25745320 in words is "twenty-five million, seven hundred forty-five thousand, three hundred twenty".