356681 has 4 divisors (see below), whose sum is σ = 384132. Its totient is φ = 329232.

The previous prime is 356663. The next prime is 356693. The reversal of 356681 is 186653.

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 115600 + 241081 = 340^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 356681 - 2¹⁴ = 340297 is a prime.

It is a super-2 number, since 2×356681² = 254442671522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 356681.

It is not an unprimeable number, because it can be changed into a prime (356621) 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, 13706 + ... + 13731.

It is an arithmetic number, because the mean of its divisors is an integer number (96033).

2³⁵⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

356681 is a deficient number, since it is larger than the sum of its proper divisors (27451).

356681 is a wasteful number, since it uses less digits than its factorization.

356681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27450.

The product of its digits is 4320, while the sum is 29.

The square root of 356681 is about 597.2277622482. The cubic root of 356681 is about 70.9185735829.

The spelling of 356681 in words is "three hundred fifty-six thousand, six hundred eighty-one".