261462361 has 4 divisors (see below), whose sum is σ = 261525924. Its totient is φ = 261398800.

The previous prime is 261462349. The next prime is 261462379. The reversal of 261462361 is 163264162.

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

It can be written as a sum of positive squares in 2 ways, for example, as 191656336 + 69806025 = 13844^2 + 8355^2 .

It is a cyclic number.

It is not a de Polignac number, because 261462361 - 2⁷ = 261462233 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261462301) 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, 25150 + ... + 33991.

It is an arithmetic number, because the mean of its divisors is an integer number (65381481).

Almost surely, 2^261462361 is an apocalyptic number.

It is an amenable number.

261462361 is a deficient number, since it is larger than the sum of its proper divisors (63563).

261462361 is an equidigital number, since it uses as much as digits as its factorization.

261462361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63562.

The product of its digits is 10368, while the sum is 31.

The square root of 261462361 is about 16169.7978033122. The cubic root of 261462361 is about 639.4447992637. Note that the first 3 decimals are identical.

The spelling of 261462361 in words is "two hundred sixty-one million, four hundred sixty-two thousand, three hundred sixty-one".