261740371 has 8 divisors (see below), whose sum is σ = 275718080. Its totient is φ = 247782888.

The previous prime is 261740357. The next prime is 261740387. The reversal of 261740371 is 173047162.

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

It is a cyclic number.

It is not a de Polignac number, because 261740371 - 2¹⁵ = 261707603 is a prime.

It is a super-2 number, since 2×261740371² = 137016043622435282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261740071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26680 + ... + 35146.

It is an arithmetic number, because the mean of its divisors is an integer number (34464760).

Almost surely, 2^261740371 is an apocalyptic number.

261740371 is a deficient number, since it is larger than the sum of its proper divisors (13977709).

261740371 is a wasteful number, since it uses less digits than its factorization.

261740371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10113.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 261740371 is about 16178.3921018128. The cubic root of 261740371 is about 639.6713571482.

The spelling of 261740371 in words is "two hundred sixty-one million, seven hundred forty thousand, three hundred seventy-one".