745000285021 has 4 divisors (see below), whose sum is σ = 745767536544. Its totient is φ = 744233033500.

The previous prime is 745000284983. The next prime is 745000285033. The reversal of 745000285021 is 120582000547.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 745000285021 - 2²⁷ = 744866067293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745006285021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383624305 + ... + 383626246.

It is an arithmetic number, because the mean of its divisors is an integer number (186441884136).

Almost surely, 2^745000285021 is an apocalyptic number.

It is an amenable number.

745000285021 is a deficient number, since it is larger than the sum of its proper divisors (767251523).

745000285021 is an equidigital number, since it uses as much as digits as its factorization.

745000285021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767251522.

The product of its (nonzero) digits is 22400, while the sum is 34.

Adding to 745000285021 its reverse (120582000547), we get a palindrome (865582285568).

The spelling of 745000285021 in words is "seven hundred forty-five billion, two hundred eighty-five thousand, twenty-one".