745686 has 20 divisors (see below), whose sum is σ = 1671252. Its totient is φ = 248508.

The previous prime is 745673. The next prime is 745697. The reversal of 745686 is 686547.

It is a happy number.

745686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×745686² = 1112095221192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745686.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 745686.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2140 + ... + 2463.

2⁷⁴⁵⁶⁸⁶ is an apocalyptic number.

745686 is an abundant number, since it is smaller than the sum of its proper divisors (925566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745686 is a wasteful number, since it uses less digits than its factorization.

745686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617 (or 4608 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 745686 is about 863.5311227744. The cubic root of 745686 is about 90.6814932741.

It can be divided in two parts, 745 and 686, that added together give a triangular number (1431 = T₅₃).

The spelling of 745686 in words is "seven hundred forty-five thousand, six hundred eighty-six".