745646 has 8 divisors (see below), whose sum is σ = 1220184. Its totient is φ = 338920.

The previous prime is 745631. The next prime is 745649. The reversal of 745646 is 646547.

745646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 7⁶ + 4² + 6⁵ + 5⁷ + 4⁹ + 6⁷ .

It is a congruent number.

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

745646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16925 + ... + 16968.

It is an arithmetic number, because the mean of its divisors is an integer number (152523).

2⁷⁴⁵⁶⁴⁶ is an apocalyptic number.

745646 is a deficient number, since it is larger than the sum of its proper divisors (474538).

745646 is a wasteful number, since it uses less digits than its factorization.

745646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33906.

The product of its digits is 20160, while the sum is 32.

The square root of 745646 is about 863.5079617467. The cubic root of 745646 is about 90.6798718031.

Subtracting from 745646 its reverse (646547), we obtain a palindrome (99099).

The spelling of 745646 in words is "seven hundred forty-five thousand, six hundred forty-six".