25361540 has 12 divisors (see below), whose sum is σ = 53259276. Its totient is φ = 10144608.

The previous prime is 25361537. The next prime is 25361579. The reversal of 25361540 is 4516352.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 12630916 = 3568^2 + 3554^2 .

It is a super-2 number, since 2×25361540² = 1286415422343200, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 634019 + ... + 634058.

It is an arithmetic number, because the mean of its divisors is an integer number (4438273).

Almost surely, 2^25361540 is an apocalyptic number.

25361540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25361540 is an abundant number, since it is smaller than the sum of its proper divisors (27897736).

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

25361540 is a wasteful number, since it uses less digits than its factorization.

25361540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268086 (or 1268084 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25361540 is about 5036.0242255176. The cubic root of 25361540 is about 293.8045656897.

Adding to 25361540 its reverse (4516352), we get a palindrome (29877892).

The spelling of 25361540 in words is "twenty-five million, three hundred sixty-one thousand, five hundred forty".