772421 has 4 divisors (see below), whose sum is σ = 831852. Its totient is φ = 712992.

The previous prime is 772403. The next prime is 772439. The reversal of 772421 is 124277.

772421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (772403) and next prime (772439).

It can be written as a sum of positive squares in 2 ways, for example, as 343396 + 429025 = 586^2 + 655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29696 + ... + 29721.

It is an arithmetic number, because the mean of its divisors is an integer number (207963).

2⁷⁷²⁴²¹ is an apocalyptic number.

It is an amenable number.

772421 is a deficient number, since it is larger than the sum of its proper divisors (59431).

772421 is a wasteful number, since it uses less digits than its factorization.

772421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59430.

The product of its digits is 784, while the sum is 23.

The square root of 772421 is about 878.8748488835. The cubic root of 772421 is about 91.7525248831.

Adding to 772421 its reverse (124277), we get a palindrome (896698).

The spelling of 772421 in words is "seven hundred seventy-two thousand, four hundred twenty-one", and thus it is an iban number.