261374 has 4 divisors (see below), whose sum is σ = 392064. Its totient is φ = 130686.

The previous prime is 261353. The next prime is 261379. The reversal of 261374 is 473162.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65342 + ... + 65345.

It is an arithmetic number, because the mean of its divisors is an integer number (98016).

2²⁶¹³⁷⁴ is an apocalyptic number.

261374 is a deficient number, since it is larger than the sum of its proper divisors (130690).

261374 is a wasteful number, since it uses less digits than its factorization.

261374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130689.

The product of its digits is 1008, while the sum is 23.

The square root of 261374 is about 511.2474938814. The cubic root of 261374 is about 63.9372757858.

The spelling of 261374 in words is "two hundred sixty-one thousand, three hundred seventy-four".