261075250 has 32 divisors (see below), whose sum is σ = 494956800. Its totient is φ = 103100400.

The previous prime is 261075247. The next prime is 261075251. The reversal of 261075250 is 52570162.

It is not an unprimeable number, because it can be changed into a prime (261075251) 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, 13141 + ... + 26359.

It is an arithmetic number, because the mean of its divisors is an integer number (15467400).

Almost surely, 2^261075250 is an apocalyptic number.

261075250 is a deficient number, since it is larger than the sum of its proper divisors (233881550).

261075250 is a wasteful number, since it uses less digits than its factorization.

261075250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315 (or 13305 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 261075250 is about 16157.8231825949. The cubic root of 261075250 is about 639.1290643597.

The spelling of 261075250 in words is "two hundred sixty-one million, seventy-five thousand, two hundred fifty".