745345 has 4 divisors (see below), whose sum is σ = 894420. Its totient is φ = 596272.

The previous prime is 745343. The next prime is 745357. The reversal of 745345 is 543547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543547 = 29 ⋅18743.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 456976 = 537^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 745345 - 2¹ = 745343 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (745343) 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, 74530 + ... + 74539.

It is an arithmetic number, because the mean of its divisors is an integer number (223605).

2⁷⁴⁵³⁴⁵ is an apocalyptic number.

It is an amenable number.

745345 is a deficient number, since it is larger than the sum of its proper divisors (149075).

745345 is a wasteful number, since it uses less digits than its factorization.

745345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149074.

The product of its digits is 8400, while the sum is 28.

The square root of 745345 is about 863.3336550836. Note that the first 3 decimals coincide. The cubic root of 745345 is about 90.6676683737.

The spelling of 745345 in words is "seven hundred forty-five thousand, three hundred forty-five".