745642 has 16 divisors (see below), whose sum is σ = 1166400. Its totient is φ = 357280.

The previous prime is 745631. The next prime is 745649. The reversal of 745642 is 246547.

It is a self number, because there is not a number n which added to its sum of digits gives 745642.

It is not an unprimeable number, because it can be changed into a prime (745649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8334 + ... + 8422.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2⁷⁴⁵⁶⁴² is an apocalyptic number.

745642 is a deficient number, since it is larger than the sum of its proper divisors (420758).

745642 is a wasteful number, since it uses less digits than its factorization.

745642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 6720, while the sum is 28.

The square root of 745642 is about 863.5056456098. The cubic root of 745642 is about 90.6797096528.

The spelling of 745642 in words is "seven hundred forty-five thousand, six hundred forty-two".