260400025 has 12 divisors (see below), whose sum is σ = 325757052. Its totient is φ = 206474240.

The previous prime is 260400013. The next prime is 260400029. The reversal of 260400025 is 520004062.

It can be written as a sum of positive squares in 6 ways, for example, as 122478489 + 137921536 = 11067^2 + 11744^2 .

It is a de Polignac number, because none of the positive numbers 2^k-260400025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260399975 and 260400011.

It is not an unprimeable number, because it can be changed into a prime (260400029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43264 + ... + 48913.

It is an arithmetic number, because the mean of its divisors is an integer number (27146421).

Almost surely, 2^260400025 is an apocalyptic number.

260400025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

260400025 is a deficient number, since it is larger than the sum of its proper divisors (65357027).

260400025 is a wasteful number, since it uses less digits than its factorization.

260400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92300 (or 92295 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 260400025 is about 16136.9149777769. The cubic root of 260400025 is about 638.5775905276.

Adding to 260400025 its reverse (520004062), we get a palindrome (780404087).

The spelling of 260400025 in words is "two hundred sixty million, four hundred thousand, twenty-five".