742831 has 4 divisors (see below), whose sum is σ = 775152. Its totient is φ = 710512.

The previous prime is 742817. The next prime is 742891. The reversal of 742831 is 138247.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742831 is a prime.

It is a super-2 number, since 2×742831² = 1103595789122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 742796 and 742805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16126 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (193788).

2⁷⁴²⁸³¹ is an apocalyptic number.

742831 is a deficient number, since it is larger than the sum of its proper divisors (32321).

742831 is a wasteful number, since it uses less digits than its factorization.

742831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32320.

The product of its digits is 1344, while the sum is 25.

The square root of 742831 is about 861.8764412606. The cubic root of 742831 is about 90.5656148399.

The spelling of 742831 in words is "seven hundred forty-two thousand, eight hundred thirty-one".