261254678 has 8 divisors (see below), whose sum is σ = 405395280. Its totient is φ = 126122920.

The previous prime is 261254671. The next prime is 261254681. The reversal of 261254678 is 876452162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261254671) 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, 2252138 + ... + 2252253.

It is an arithmetic number, because the mean of its divisors is an integer number (50674410).

Almost surely, 2^261254678 is an apocalyptic number.

261254678 is a deficient number, since it is larger than the sum of its proper divisors (144140602).

261254678 is a wasteful number, since it uses less digits than its factorization.

261254678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504422.

The product of its digits is 161280, while the sum is 41.

The square root of 261254678 is about 16163.3745857726. The cubic root of 261254678 is about 639.2754479387.

It can be divided in two parts, 26125 and 4678, that added together give a palindrome (30803).

The spelling of 261254678 in words is "two hundred sixty-one million, two hundred fifty-four thousand, six hundred seventy-eight".