5721123 has 4 divisors (see below), whose sum is σ = 7628168. Its totient is φ = 3814080.

The previous prime is 5721119. The next prime is 5721127. The reversal of 5721123 is 3211275.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5721119) and next prime (5721127).

It is not a de Polignac number, because 5721123 - 2² = 5721119 is a prime.

It is a super-2 number, since 2×5721123² = 65462496762258, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5721123.

It is not an unprimeable number, because it can be changed into a prime (5721127) 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 3 ways as a sum of consecutive naturals, for example, 953518 + ... + 953523.

It is an arithmetic number, because the mean of its divisors is an integer number (1907042).

Almost surely, 2^5721123 is an apocalyptic number.

5721123 is a deficient number, since it is larger than the sum of its proper divisors (1907045).

5721123 is a wasteful number, since it uses less digits than its factorization.

5721123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907044.

The product of its digits is 420, while the sum is 21.

The square root of 5721123 is about 2391.8869120425. The cubic root of 5721123 is about 178.8519837939.

Adding to 5721123 its reverse (3211275), we get a palindrome (8932398).

The spelling of 5721123 in words is "five million, seven hundred twenty-one thousand, one hundred twenty-three".