261274016 has 24 divisors (see below), whose sum is σ = 541457280. Its totient is φ = 123761088.

The previous prime is 261274001. The next prime is 261274019. The reversal of 261274016 is 610472162.

261274016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261274016² = 136528222873536512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261274016.

It is not an unprimeable number, because it can be changed into a prime (261274019) 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, 214256 + ... + 215471.

It is an arithmetic number, because the mean of its divisors is an integer number (22560720).

Almost surely, 2^261274016 is an apocalyptic number.

It is an amenable number.

261274016 is an abundant number, since it is smaller than the sum of its proper divisors (280183264).

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

261274016 is a wasteful number, since it uses less digits than its factorization.

261274016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429756 (or 429748 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 261274016 is about 16163.9727789922. The cubic root of 261274016 is about 639.2912205476.

The spelling of 261274016 in words is "two hundred sixty-one million, two hundred seventy-four thousand, sixteen".