745618 has 4 divisors (see below), whose sum is σ = 1118430. Its totient is φ = 372808.

The previous prime is 745609. The next prime is 745621. The reversal of 745618 is 816547.

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

It can be written as a sum of positive squares in only one way, i.e., 710649 + 34969 = 843^2 + 187^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 745618.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186403 + ... + 186406.

2⁷⁴⁵⁶¹⁸ is an apocalyptic number.

745618 is a deficient number, since it is larger than the sum of its proper divisors (372812).

745618 is a wasteful number, since it uses less digits than its factorization.

745618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372811.

The product of its digits is 6720, while the sum is 31.

The square root of 745618 is about 863.4917486577. The cubic root of 745618 is about 90.6787367389.

The spelling of 745618 in words is "seven hundred forty-five thousand, six hundred eighteen".