745812 has 18 divisors (see below), whose sum is σ = 1885338. Its totient is φ = 248592.

The previous prime is 745757. The next prime is 745817. The reversal of 745812 is 218547.

It can be written as a sum of positive squares in only one way, i.e., 427716 + 318096 = 654^2 + 564^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745817) by changing a digit.

745812 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 5 ways as a sum of consecutive naturals, for example, 10323 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (104741).

2⁷⁴⁵⁸¹² is an apocalyptic number.

It is an amenable number.

745812 is an abundant number, since it is smaller than the sum of its proper divisors (1139526).

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

745812 is a wasteful number, since it uses less digits than its factorization.

745812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20727 (or 20722 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 745812 is about 863.6040759515. The cubic root of 745812 is about 90.6866005286.

It can be divided in two parts, 74 and 5812, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 745812 in words is "seven hundred forty-five thousand, eight hundred twelve".