261054 has 12 divisors (see below), whose sum is σ = 565656. Its totient is φ = 87012.

The previous prime is 261043. The next prime is 261059. The reversal of 261054 is 450162.

It is a happy number.

261054 is a `hidden beast` number, since 2 + 610 + 54 = 666.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 14503 = 261054 / (2 + 6 + 1 + 0 + 5 + 4).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261054.

It is not an unprimeable number, because it can be changed into a prime (261059) by changing a digit.

261054 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7234 + ... + 7269.

It is an arithmetic number, because the mean of its divisors is an integer number (47138).

2²⁶¹⁰⁵⁴ is an apocalyptic number.

261054 is an abundant number, since it is smaller than the sum of its proper divisors (304602).

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

261054 is a wasteful number, since it uses less digits than its factorization.

261054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14511 (or 14508 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 261054 is about 510.9344380642. The cubic root of 261054 is about 63.9111723432.

The spelling of 261054 in words is "two hundred sixty-one thousand, fifty-four".