261494 has 8 divisors (see below), whose sum is σ = 415368. Its totient is φ = 123040.

The previous prime is 261467. The next prime is 261509. The reversal of 261494 is 494162.

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

It is a super-2 number, since 2×261494² = 136758224072, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3812 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (51921).

2²⁶¹⁴⁹⁴ is an apocalyptic number.

261494 is a deficient number, since it is larger than the sum of its proper divisors (153874).

261494 is a wasteful number, since it uses less digits than its factorization.

261494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7710.

The product of its digits is 1728, while the sum is 26.

The square root of 261494 is about 511.3648404026. The cubic root of 261494 is about 63.9470590838.

The spelling of 261494 in words is "two hundred sixty-one thousand, four hundred ninety-four".