261431461 has 8 divisors (see below), whose sum is σ = 265075200. Its totient is φ = 257796240.

The previous prime is 261431459. The next prime is 261431473. The reversal of 261431461 is 164134162.

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 261431461 - 2¹ = 261431459 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 (261431861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82260 + ... + 85378.

It is an arithmetic number, because the mean of its divisors is an integer number (33134400).

Almost surely, 2^261431461 is an apocalyptic number.

It is an amenable number.

261431461 is a deficient number, since it is larger than the sum of its proper divisors (3643739).

261431461 is a wasteful number, since it uses less digits than its factorization.

261431461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259.

The product of its digits is 3456, while the sum is 28.

The square root of 261431461 is about 16168.8422900342. The cubic root of 261431461 is about 639.4196081009.

The spelling of 261431461 in words is "two hundred sixty-one million, four hundred thirty-one thousand, four hundred sixty-one".