261460447 has 4 divisors (see below), whose sum is σ = 265892040. Its totient is φ = 257028856.

The previous prime is 261460427. The next prime is 261460471. The reversal of 261460447 is 744064162.

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

It is a cyclic number.

It is not a de Polignac number, because 261460447 - 2¹¹ = 261458399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261460427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215708 + ... + 2215825.

It is an arithmetic number, because the mean of its divisors is an integer number (66473010).

Almost surely, 2^261460447 is an apocalyptic number.

261460447 is a deficient number, since it is larger than the sum of its proper divisors (4431593).

261460447 is an equidigital number, since it uses as much as digits as its factorization.

261460447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431592.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 261460447 is about 16169.7386187903. The cubic root of 261460447 is about 639.4432389367.

The spelling of 261460447 in words is "two hundred sixty-one million, four hundred sixty thousand, four hundred forty-seven".