745138606 has 8 divisors (see below), whose sum is σ = 1127962440. Its totient is φ = 369151128.

The previous prime is 745138579. The next prime is 745138609. The reversal of 745138606 is 606831547.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745138609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708816 + ... + 1709251.

It is an arithmetic number, because the mean of its divisors is an integer number (140995305).

Almost surely, 2^745138606 is an apocalyptic number.

745138606 is a deficient number, since it is larger than the sum of its proper divisors (382823834).

745138606 is a wasteful number, since it uses less digits than its factorization.

745138606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418178.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 745138606 is about 27297.2270752910. The cubic root of 745138606 is about 906.5929865214.

The spelling of 745138606 in words is "seven hundred forty-five million, one hundred thirty-eight thousand, six hundred six".