745405 has 8 divisors (see below), whose sum is σ = 915552. Its totient is φ = 582288.

The previous prime is 745397. The next prime is 745471. The reversal of 745405 is 504547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 745405 - 2³ = 745397 is a prime.

It is a super-2 number, since 2×745405² = 1111257228050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 745405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519 + ... + 1948.

It is an arithmetic number, because the mean of its divisors is an integer number (114444).

2⁷⁴⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

745405 is a deficient number, since it is larger than the sum of its proper divisors (170147).

745405 is a wasteful number, since it uses less digits than its factorization.

745405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 745405 is about 863.3684034061. The cubic root of 745405 is about 90.6701012131.

The spelling of 745405 in words is "seven hundred forty-five thousand, four hundred five".