745831 has 4 divisors (see below), whose sum is σ = 764064. Its totient is φ = 727600.

The previous prime is 745817. The next prime is 745837. The reversal of 745831 is 138547.

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 745831 - 2¹⁷ = 614759 is a prime.

It is a super-2 number, since 2×745831² = 1112527761122, which contains 22 as substring.

It is a Duffinian number.

745831 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 745831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745837) 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, 9055 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (191016).

2⁷⁴⁵⁸³¹ is an apocalyptic number.

745831 is a deficient number, since it is larger than the sum of its proper divisors (18233).

745831 is a wasteful number, since it uses less digits than its factorization.

745831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18232.

The product of its digits is 3360, while the sum is 28.

The square root of 745831 is about 863.6150762927. The cubic root of 745831 is about 90.6873706203.

The spelling of 745831 in words is "seven hundred forty-five thousand, eight hundred thirty-one".