681263 has 4 divisors (see below), whose sum is σ = 743208. Its totient is φ = 619320.

The previous prime is 681259. The next prime is 681271. The reversal of 681263 is 362186.

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

It is a cyclic number.

It is not a de Polignac number, because 681263 - 2² = 681259 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30956 + ... + 30977.

It is an arithmetic number, because the mean of its divisors is an integer number (185802).

2⁶⁸¹²⁶³ is an apocalyptic number.

681263 is a deficient number, since it is larger than the sum of its proper divisors (61945).

681263 is a wasteful number, since it uses less digits than its factorization.

681263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61944.

The product of its digits is 1728, while the sum is 26.

The square root of 681263 is about 825.3865760963. The cubic root of 681263 is about 87.9910028680.

It can be divided in two parts, 68 and 1263, that added together give a palindrome (1331).

The spelling of 681263 in words is "six hundred eighty-one thousand, two hundred sixty-three".