742123 has 4 divisors (see below), whose sum is σ = 744808. Its totient is φ = 739440.

The previous prime is 742117. The next prime is 742127. The reversal of 742123 is 321247.

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-742123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 742123.

It is not an unprimeable number, because it can be changed into a prime (742127) 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, 873 + ... + 1498.

It is an arithmetic number, because the mean of its divisors is an integer number (186202).

2⁷⁴²¹²³ is an apocalyptic number.

742123 is a deficient number, since it is larger than the sum of its proper divisors (2685).

742123 is a wasteful number, since it uses less digits than its factorization.

742123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its digits is 336, while the sum is 19.

The square root of 742123 is about 861.4656116178. The cubic root of 742123 is about 90.5368326820.

It can be divided in two parts, 74 and 2123, that added together give a cube (2197 = 13³).

The spelling of 742123 in words is "seven hundred forty-two thousand, one hundred twenty-three", and thus it is an iban number.