745849 has 4 divisors (see below), whose sum is σ = 803236. Its totient is φ = 688464.

The previous prime is 745837. The next prime is 745859. The reversal of 745849 is 948547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 310249 = 660^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 745849 - 2⁵ = 745817 is a prime.

It is a Duffinian number.

745849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (745859) 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 3 ways as a sum of consecutive naturals, for example, 28674 + ... + 28699.

It is an arithmetic number, because the mean of its divisors is an integer number (200809).

2⁷⁴⁵⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

745849 is a deficient number, since it is larger than the sum of its proper divisors (57387).

745849 is a wasteful number, since it uses less digits than its factorization.

745849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57386.

The product of its digits is 40320, while the sum is 37.

The square root of 745849 is about 863.6254975393. The cubic root of 745849 is about 90.6881001687.

The spelling of 745849 in words is "seven hundred forty-five thousand, eight hundred forty-nine".