712421 has 4 divisors (see below), whose sum is σ = 714144. Its totient is φ = 710700.

The previous prime is 712417. The next prime is 712427. The reversal of 712421 is 124217.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124217 = 31 ⋅4007.

It is a cyclic number.

It is not a de Polignac number, because 712421 - 2² = 712417 is a prime.

It is an Ulam 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 712421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712427) 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 in 3 ways as a sum of consecutive naturals, for example, 176 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (178536).

2⁷¹²⁴²¹ is an apocalyptic number.

It is an amenable number.

712421 is a deficient number, since it is larger than the sum of its proper divisors (1723).

712421 is a wasteful number, since it uses less digits than its factorization.

712421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722.

The product of its digits is 112, while the sum is 17.

The square root of 712421 is about 844.0503539482. The cubic root of 712421 is about 89.3124982350.

Adding to 712421 its reverse (124217), we get a palindrome (836638).

The spelling of 712421 in words is "seven hundred twelve thousand, four hundred twenty-one", and thus it is an iban number.