260400125 has 16 divisors (see below), whose sum is σ = 329442672. Its totient is φ = 205459200.

The previous prime is 260400121. The next prime is 260400137. The reversal of 260400125 is 521004062.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 129663769 + 130736356 = 11387^2 + 11434^2 .

It is not a de Polignac number, because 260400125 - 2² = 260400121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260400097 and 260400106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260400121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5144 + ... + 23393.

It is an arithmetic number, because the mean of its divisors is an integer number (20590167).

Almost surely, 2^260400125 is an apocalyptic number.

260400125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

260400125 is a deficient number, since it is larger than the sum of its proper divisors (69042547).

260400125 is an equidigital number, since it uses as much as digits as its factorization.

260400125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28625 (or 28615 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 260400125 is about 16136.9180762623. The cubic root of 260400125 is about 638.5776722708.

Adding to 260400125 its reverse (521004062), we get a palindrome (781404187).

The spelling of 260400125 in words is "two hundred sixty million, four hundred thousand, one hundred twenty-five".