261374849 has 8 divisors (see below), whose sum is σ = 280986240. Its totient is φ = 242348976.

The previous prime is 261374843. The next prime is 261374891. The reversal of 261374849 is 948473162.

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 261374849 - 2⁴ = 261374833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261374843) 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, 145454 + ... + 147239.

It is an arithmetic number, because the mean of its divisors is an integer number (35123280).

Almost surely, 2^261374849 is an apocalyptic number.

It is an amenable number.

261374849 is a deficient number, since it is larger than the sum of its proper divisors (19611391).

261374849 is a wasteful number, since it uses less digits than its factorization.

261374849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292759.

The product of its digits is 290304, while the sum is 44.

The square root of 261374849 is about 16167.0915442451. The cubic root of 261374849 is about 639.3734501316.

The spelling of 261374849 in words is "two hundred sixty-one million, three hundred seventy-four thousand, eight hundred forty-nine".