753421 has 2 divisors, whose sum is σ = 753422. Its totient is φ = 753420.

The previous prime is 753409. The next prime is 753427. The reversal of 753421 is 124357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 12100 = 861^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 753421 - 2¹⁵ = 720653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 753392 and 753401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (753427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 376710 + 376711.

It is an arithmetic number, because the mean of its divisors is an integer number (376711).

2⁷⁵³⁴²¹ is an apocalyptic number.

It is an amenable number.

753421 is a deficient number, since it is larger than the sum of its proper divisors (1).

753421 is an equidigital number, since it uses as much as digits as its factorization.

753421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 22.

The square root of 753421 is about 867.9982718877. The cubic root of 753421 is about 90.9939616812.

Adding to 753421 its reverse (124357), we get a palindrome (877778).

The spelling of 753421 in words is "seven hundred fifty-three thousand, four hundred twenty-one".