261351125 has 16 divisors (see below), whose sum is σ = 372762624. Its totient is φ = 179211600.

The previous prime is 261351113. The next prime is 261351127. The reversal of 261351125 is 521153162.

It is not a de Polignac number, because 261351125 - 2¹⁰ = 261350101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261351094 and 261351103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261351127) 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, 148469 + ... + 150218.

It is an arithmetic number, because the mean of its divisors is an integer number (23297664).

Almost surely, 2^261351125 is an apocalyptic number.

261351125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261351125 is a deficient number, since it is larger than the sum of its proper divisors (111411499).

261351125 is an equidigital number, since it uses as much as digits as its factorization.

261351125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298709 (or 298699 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 261351125 is about 16166.3578149192. The cubic root of 261351125 is about 639.3541050483.

The spelling of 261351125 in words is "two hundred sixty-one million, three hundred fifty-one thousand, one hundred twenty-five".