745658 has 4 divisors (see below), whose sum is σ = 1118490. Its totient is φ = 372828.

The previous prime is 745649. The next prime is 745673. The reversal of 745658 is 856547.

745658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 405769 + 339889 = 637^2 + 583^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186413 + ... + 186416.

2⁷⁴⁵⁶⁵⁸ is an apocalyptic number.

745658 is a deficient number, since it is larger than the sum of its proper divisors (372832).

745658 is a wasteful number, since it uses less digits than its factorization.

745658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372831.

The product of its digits is 33600, while the sum is 35.

The square root of 745658 is about 863.5149101203. The cubic root of 745658 is about 90.6803582505.

Subtracting 745658 from its reverse (856547), we obtain a square (110889 = 333²).

The spelling of 745658 in words is "seven hundred forty-five thousand, six hundred fifty-eight".