745641 has 12 divisors (see below), whose sum is σ = 1160068. Its totient is φ = 458784.

The previous prime is 745631. The next prime is 745649. The reversal of 745641 is 146547.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 385641 = 600^2 + 621^2 .

It is not a de Polignac number, because 745641 - 2⁵ = 745609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (745649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3070 + ... + 3303.

2⁷⁴⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

745641 is a deficient number, since it is larger than the sum of its proper divisors (414427).

745641 is a wasteful number, since it uses less digits than its factorization.

745641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392 (or 6389 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 745641 is about 863.5050665746. The cubic root of 745641 is about 90.6796691151.

The spelling of 745641 in words is "seven hundred forty-five thousand, six hundred forty-one".