25061840 has 20 divisors (see below), whose sum is σ = 58268964. Its totient is φ = 10024704.

The previous prime is 25061801. The next prime is 25061867. The reversal of 25061840 is 4816052.

It can be written as a sum of positive squares in 2 ways, for example, as 6330256 + 18731584 = 2516^2 + 4328^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156557 + ... + 156716.

Almost surely, 2^25061840 is an apocalyptic number.

25061840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25061840 is an abundant number, since it is smaller than the sum of its proper divisors (33207124).

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

25061840 is a wasteful number, since it uses less digits than its factorization.

25061840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313286 (or 313280 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 25061840 is about 5006.1801805369. The cubic root of 25061840 is about 292.6426703124.

Adding to 25061840 its reverse (4816052), we get a palindrome (29877892).

The spelling of 25061840 in words is "twenty-five million, sixty-one thousand, eight hundred forty".