261344054 has 8 divisors (see below), whose sum is σ = 392864160. Its totient is φ = 130389336.

The previous prime is 261344051. The next prime is 261344059. The reversal of 261344054 is 450443162.

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

It is a super-2 number, since 2×261344054² = 136601429122309832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261344051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140189 + ... + 142040.

It is an arithmetic number, because the mean of its divisors is an integer number (49108020).

Almost surely, 2^261344054 is an apocalyptic number.

261344054 is a deficient number, since it is larger than the sum of its proper divisors (131520106).

261344054 is a wasteful number, since it uses less digits than its factorization.

261344054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282694.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 261344054 is about 16166.1391185403. The cubic root of 261344054 is about 639.3483389693.

The spelling of 261344054 in words is "two hundred sixty-one million, three hundred forty-four thousand, fifty-four".