25261000 has 32 divisors (see below), whose sum is σ = 59113080. Its totient is φ = 10104000.

The previous prime is 25260979. The next prime is 25261003. The reversal of 25261000 is 16252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3189796 + 22071204 = 1786^2 + 4698^2 .

It is not an unprimeable number, because it can be changed into a prime (25261003) 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 7 ways as a sum of consecutive naturals, for example, 11631 + ... + 13630.

Almost surely, 2^25261000 is an apocalyptic number.

25261000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25261000 is an abundant number, since it is smaller than the sum of its proper divisors (33852080).

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

25261000 is a wasteful number, since it uses less digits than its factorization.

25261000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25282 (or 25268 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 25261000 is about 5026.0322322882. The cubic root of 25261000 is about 293.4158112883.

Adding to 25261000 its reverse (16252), we get a palindrome (25277252).

The spelling of 25261000 in words is "twenty-five million, two hundred sixty-one thousand".