745706245 has 4 divisors (see below), whose sum is σ = 894847500. Its totient is φ = 596564992.

The previous prime is 745706239. The next prime is 745706257. The reversal of 745706245 is 542607547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542607547 = 17 ⋅31918091.

It can be written as a sum of positive squares in 2 ways, for example, as 500282689 + 245423556 = 22367^2 + 15666^2 .

It is a cyclic number.

It is not a de Polignac number, because 745706245 - 2²⁷ = 611488517 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 745706198 and 745706207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74570620 + ... + 74570629.

It is an arithmetic number, because the mean of its divisors is an integer number (223711875).

Almost surely, 2^745706245 is an apocalyptic number.

It is an amenable number.

745706245 is a deficient number, since it is larger than the sum of its proper divisors (149141255).

745706245 is a wasteful number, since it uses less digits than its factorization.

745706245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149141254.

The product of its (nonzero) digits is 235200, while the sum is 40.

The square root of 745706245 is about 27307.6224706583. The cubic root of 745706245 is about 906.8231391895.

The spelling of 745706245 in words is "seven hundred forty-five million, seven hundred six thousand, two hundred forty-five".