261900260 has 12 divisors (see below), whose sum is σ = 549990588. Its totient is φ = 104760096.

The previous prime is 261900257. The next prime is 261900269. The reversal of 261900260 is 62009162.

It can be written as a sum of positive squares in 2 ways, for example, as 122235136 + 139665124 = 11056^2 + 11818^2 .

It is not an unprimeable number, because it can be changed into a prime (261900269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6547487 + ... + 6547526.

It is an arithmetic number, because the mean of its divisors is an integer number (45832549).

Almost surely, 2^261900260 is an apocalyptic number.

261900260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261900260 is an abundant number, since it is smaller than the sum of its proper divisors (288090328).

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

261900260 is a wasteful number, since it uses less digits than its factorization.

261900260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13095022 (or 13095020 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 261900260 is about 16183.3327840714. The cubic root of 261900260 is about 639.8015823716.

The spelling of 261900260 in words is "two hundred sixty-one million, nine hundred thousand, two hundred sixty".