261246456 has 48 divisors (see below), whose sum is σ = 710151000. Its totient is φ = 86761152.

The previous prime is 261246451. The next prime is 261246473. The reversal of 261246456 is 654642162.

261246456 is a `hidden beast` number, since 2 + 6 + 1 + 2 + 4 + 645 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 261246456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261246451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13395 + ... + 26493.

Almost surely, 2^261246456 is an apocalyptic number.

It is an amenable number.

261246456 is an abundant number, since it is smaller than the sum of its proper divisors (448904544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261246456 is a wasteful number, since it uses less digits than its factorization.

261246456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13388 (or 13381 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 261246456 is about 16163.1202433194. The cubic root of 261246456 is about 639.2687416117.

The spelling of 261246456 in words is "two hundred sixty-one million, two hundred forty-six thousand, four hundred fifty-six".