742129 has 4 divisors (see below), whose sum is σ = 747684. Its totient is φ = 736576.

The previous prime is 742127. The next prime is 742151. The reversal of 742129 is 921247.

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

It can be written as a sum of positive squares in 2 ways, for example, as 223729 + 518400 = 473^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 742129 - 2¹ = 742127 is a prime.

It is a Duffinian number.

742129 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742127) 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, 2572 + ... + 2845.

It is an arithmetic number, because the mean of its divisors is an integer number (186921).

2⁷⁴²¹²⁹ is an apocalyptic number.

It is an amenable number.

742129 is a deficient number, since it is larger than the sum of its proper divisors (5555).

742129 is a wasteful number, since it uses less digits than its factorization.

742129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554.

The product of its digits is 1008, while the sum is 25.

The square root of 742129 is about 861.4690940481. The cubic root of 742129 is about 90.5370766755.

The spelling of 742129 in words is "seven hundred forty-two thousand, one hundred twenty-nine".