743121 has 16 divisors (see below), whose sum is σ = 1166400. Its totient is φ = 465984.

The previous prime is 743111. The next prime is 743123. The reversal of 743121 is 121347.

It is not a de Polignac number, because 743121 - 2⁵ = 743089 is a prime.

743121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 743094 and 743103.

It is not an unprimeable number, because it can be changed into a prime (743123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2⁷⁴³¹²¹ is an apocalyptic number.

It is an amenable number.

743121 is a deficient number, since it is larger than the sum of its proper divisors (423279).

743121 is a wasteful number, since it uses less digits than its factorization.

743121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1639 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 743121 is about 862.0446624160. The cubic root of 743121 is about 90.5773988622.

Adding to 743121 its reverse (121347), we get a palindrome (864468).

The spelling of 743121 in words is "seven hundred forty-three thousand, one hundred twenty-one", and thus it is an iban number.