261345443 has 8 divisors (see below), whose sum is σ = 268021248. Its totient is φ = 254696904.

The previous prime is 261345401. The next prime is 261345449. The reversal of 261345443 is 344543162.

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

It is a cyclic number.

It is not a de Polignac number, because 261345443 - 2⁶ = 261345379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261345449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13346 + ... + 26472.

It is an arithmetic number, because the mean of its divisors is an integer number (33502656).

Almost surely, 2^261345443 is an apocalyptic number.

261345443 is a deficient number, since it is larger than the sum of its proper divisors (6675805).

261345443 is a wasteful number, since it uses less digits than its factorization.

261345443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13633.

The product of its digits is 34560, while the sum is 32.

The square root of 261345443 is about 16166.1820786480. The cubic root of 261345443 is about 639.3494716439.

The spelling of 261345443 in words is "two hundred sixty-one million, three hundred forty-five thousand, four hundred forty-three".