340087261 has 8 divisors (see below), whose sum is σ = 365996664. Its totient is φ = 314833920.

The previous prime is 340087249. The next prime is 340087343. The reversal of 340087261 is 162780043.

It can be written as a sum of positive squares in 4 ways, for example, as 79103236 + 260984025 = 8894^2 + 16155^2 .

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 340087261 - 2⁵ = 340087229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340087861) 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, 162940 + ... + 165013.

It is an arithmetic number, because the mean of its divisors is an integer number (45749583).

Almost surely, 2^340087261 is an apocalyptic number.

It is an amenable number.

340087261 is a deficient number, since it is larger than the sum of its proper divisors (25909403).

340087261 is a wasteful number, since it uses less digits than its factorization.

340087261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328031.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 340087261 is about 18441.4549588692. The cubic root of 340087261 is about 698.0129094801.

The spelling of 340087261 in words is "three hundred forty million, eighty-seven thousand, two hundred sixty-one".