747028121 has 16 divisors (see below), whose sum is σ = 881654400. Its totient is φ = 619653888.

The previous prime is 747028099. The next prime is 747028147. The reversal of 747028121 is 121820747.

It is a happy number.

It is not a de Polignac number, because 747028121 - 2¹⁸ = 746765977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747028621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21425 + ... + 44193.

It is an arithmetic number, because the mean of its divisors is an integer number (55103400).

Almost surely, 2^747028121 is an apocalyptic number.

It is an amenable number.

747028121 is a deficient number, since it is larger than the sum of its proper divisors (134626279).

747028121 is a wasteful number, since it uses less digits than its factorization.

747028121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22928.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 747028121 is about 27331.8151793839. The cubic root of 747028121 is about 907.3586494982.

Adding to 747028121 its reverse (121820747), we get a palindrome (868848868).

The spelling of 747028121 in words is "seven hundred forty-seven million, twenty-eight thousand, one hundred twenty-one".