745222 has 4 divisors (see below), whose sum is σ = 1117836. Its totient is φ = 372610.

The previous prime is 745201. The next prime is 745231. The reversal of 745222 is 222547.

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

It is a Smith number, since the sum of its digits (22) 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 = 745193 and 745202.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 186304 + ... + 186307.

It is an arithmetic number, because the mean of its divisors is an integer number (279459).

2⁷⁴⁵²²² is an apocalyptic number.

745222 is a deficient number, since it is larger than the sum of its proper divisors (372614).

745222 is a wasteful number, since it uses less digits than its factorization.

745222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372613.

The product of its digits is 1120, while the sum is 22.

The square root of 745222 is about 863.2624166498. The cubic root of 745222 is about 90.6626806446.

Adding to 745222 its reverse (222547), we get a palindrome (967769).

The spelling of 745222 in words is "seven hundred forty-five thousand, two hundred twenty-two".