261190 has 8 divisors (see below), whose sum is σ = 470160. Its totient is φ = 104472.

The previous prime is 261169. The next prime is 261223. The reversal of 261190 is 91162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261190² = 136440432200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

261190 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13050 + ... + 13069.

It is an arithmetic number, because the mean of its divisors is an integer number (58770).

2²⁶¹¹⁹⁰ is an apocalyptic number.

261190 is a deficient number, since it is larger than the sum of its proper divisors (208970).

261190 is a wasteful number, since it uses less digits than its factorization.

261190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26126.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 261190 is about 511.0675102176. The cubic root of 261190 is about 63.9222689113.

It can be divided in two parts, 2611 and 90, that added together give a triangular number (2701 = T₇₃).

The spelling of 261190 in words is "two hundred sixty-one thousand, one hundred ninety".