745138541 has 12 divisors (see below), whose sum is σ = 867649212. Its totient is φ = 638059968.

The previous prime is 745138531. The next prime is 745138547. The reversal of 745138541 is 145831547.

It can be written as a sum of positive squares in 2 ways, for example, as 642825316 + 102313225 = 25354^2 + 10115^2 .

It is not a de Polignac number, because 745138541 - 2¹⁰ = 745137517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745138495 and 745138504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745138547) 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 11 ways as a sum of consecutive naturals, for example, 46601 + ... + 60513.

It is an arithmetic number, because the mean of its divisors is an integer number (72304101).

Almost surely, 2^745138541 is an apocalyptic number.

It is an amenable number.

745138541 is a deficient number, since it is larger than the sum of its proper divisors (122510671).

745138541 is a wasteful number, since it uses less digits than its factorization.

745138541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15020 (or 15013 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 745138541 is about 27297.2258846939. The cubic root of 745138541 is about 906.5929601601.

The spelling of 745138541 in words is "seven hundred forty-five million, one hundred thirty-eight thousand, five hundred forty-one".