340981 has 4 divisors (see below), whose sum is σ = 342700. Its totient is φ = 339264.

The previous prime is 340979. The next prime is 340999. The reversal of 340981 is 189043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207025 + 133956 = 455^2 + 366^2 .

It is a cyclic number.

It is not a de Polignac number, because 340981 - 2¹ = 340979 is a prime.

It is a super-2 number, since 2×340981² = 232536084722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340931) 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, 516 + ... + 973.

It is an arithmetic number, because the mean of its divisors is an integer number (85675).

2³⁴⁰⁹⁸¹ is an apocalyptic number.

It is an amenable number.

340981 is a deficient number, since it is larger than the sum of its proper divisors (1719).

340981 is a wasteful number, since it uses less digits than its factorization.

340981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 340981 is about 583.9357841407. The cubic root of 340981 is about 69.8623826882.

The spelling of 340981 in words is "three hundred forty thousand, nine hundred eighty-one".