25243290 has 48 divisors (see below), whose sum is σ = 67243176. Its totient is φ = 6566400.

The previous prime is 25243289. The next prime is 25243291. The reversal of 25243290 is 9234252.

It is an interprime number because it is at equal distance from previous prime (25243289) and next prime (25243291).

It can be written as a sum of positive squares in 4 ways, for example, as 16966161 + 8277129 = 4119^2 + 2877^2 .

It is not an unprimeable number, because it can be changed into a prime (25243291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270 + ... + 7110.

Almost surely, 2^25243290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25243290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33621588).

25243290 is an abundant number, since it is smaller than the sum of its proper divisors (41999886).

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

25243290 is a wasteful number, since it uses less digits than its factorization.

25243290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895 (or 6892 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25243290 is about 5024.2700962428. The cubic root of 25243290 is about 293.3472258687.

The spelling of 25243290 in words is "twenty-five million, two hundred forty-three thousand, two hundred ninety".