742523 has 4 divisors (see below), whose sum is σ = 749208. Its totient is φ = 735840.

The previous prime is 742519. The next prime is 742531. The reversal of 742523 is 325247.

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 742523 - 2² = 742519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742513) 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, 3173 + ... + 3398.

It is an arithmetic number, because the mean of its divisors is an integer number (187302).

2⁷⁴²⁵²³ is an apocalyptic number.

742523 is a deficient number, since it is larger than the sum of its proper divisors (6685).

742523 is a wasteful number, since it uses less digits than its factorization.

742523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6684.

The product of its digits is 1680, while the sum is 23.

The square root of 742523 is about 861.6977428310. The cubic root of 742523 is about 90.5530960366.

The spelling of 742523 in words is "seven hundred forty-two thousand, five hundred twenty-three".