742813 has 4 divisors (see below), whose sum is σ = 746368. Its totient is φ = 739260.

The previous prime is 742801. The next prime is 742817. The reversal of 742813 is 318247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742813 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742817) 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, 1443 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (186592).

It is a Poulet number, since it divides 2⁷⁴²⁸¹²-1.

2⁷⁴²⁸¹³ is an apocalyptic number.

It is an amenable number.

742813 is a deficient number, since it is larger than the sum of its proper divisors (3555).

742813 is a wasteful number, since it uses less digits than its factorization.

742813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

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

The square root of 742813 is about 861.8659988653. The cubic root of 742813 is about 90.5648833167.

The spelling of 742813 in words is "seven hundred forty-two thousand, eight hundred thirteen".