742605 has 16 divisors (see below), whose sum is σ = 1227264. Its totient is φ = 383040.

The previous prime is 742591. The next prime is 742607. The reversal of 742605 is 506247.

It is a happy number.

It is not a de Polignac number, because 742605 - 2⁶ = 742541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742607) 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 15 ways as a sum of consecutive naturals, for example, 334 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (76704).

2⁷⁴²⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

742605 is a deficient number, since it is larger than the sum of its proper divisors (484659).

742605 is a wasteful number, since it uses less digits than its factorization.

742605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 742605 is about 861.7453220064. The cubic root of 742605 is about 90.5564293028.

The spelling of 742605 in words is "seven hundred forty-two thousand, six hundred five".