261943270 has 8 divisors (see below), whose sum is σ = 471497904. Its totient is φ = 104777304.

The previous prime is 261943247. The next prime is 261943289. The reversal of 261943270 is 72349162.

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

It is a super-2 number, since 2×261943270² = 137228553396585800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13097154 + ... + 13097173.

It is an arithmetic number, because the mean of its divisors is an integer number (58937238).

Almost surely, 2^261943270 is an apocalyptic number.

261943270 is a deficient number, since it is larger than the sum of its proper divisors (209554634).

261943270 is a wasteful number, since it uses less digits than its factorization.

261943270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26194334.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 261943270 is about 16184.6615658160. The cubic root of 261943270 is about 639.8366037952.

The spelling of 261943270 in words is "two hundred sixty-one million, nine hundred forty-three thousand, two hundred seventy".