261317076 has 24 divisors (see below), whose sum is σ = 636250944. Its totient is φ = 83318400.

The previous prime is 261317041. The next prime is 261317101. The reversal of 261317076 is 670713162.

It is a super-3 number, since 3×261317076³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473125 + ... + 473676.

It is an arithmetic number, because the mean of its divisors is an integer number (26510456).

Almost surely, 2^261317076 is an apocalyptic number.

It is an amenable number.

261317076 is an abundant number, since it is smaller than the sum of its proper divisors (374933868).

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

261317076 is a wasteful number, since it uses less digits than its factorization.

261317076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946831 (or 946829 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 261317076 is about 16165.3046986439. The cubic root of 261317076 is about 639.3263386818.

The spelling of 261317076 in words is "two hundred sixty-one million, three hundred seventeen thousand, seventy-six".