763221 has 4 divisors (see below), whose sum is σ = 1017632. Its totient is φ = 508812.

The previous prime is 763201. The next prime is 763223. The reversal of 763221 is 122367.

It is a happy number.

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.

It is not a de Polignac number, because 763221 - 2⁶ = 763157 is a prime.

It is a super-3 number, since 3×763221³ = 1333743110564528583, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 10 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 763221.

It is not an unprimeable number, because it can be changed into a prime (763223) 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, 127201 + ... + 127206.

It is an arithmetic number, because the mean of its divisors is an integer number (254408).

2⁷⁶³²²¹ is an apocalyptic number.

It is an amenable number.

763221 is a deficient number, since it is larger than the sum of its proper divisors (254411).

763221 is a wasteful number, since it uses less digits than its factorization.

763221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254410.

The product of its digits is 504, while the sum is 21.

The square root of 763221 is about 873.6252056803. The cubic root of 763221 is about 91.3867930169.

Adding to 763221 its reverse (122367), we get a palindrome (885588).

The spelling of 763221 in words is "seven hundred sixty-three thousand, two hundred twenty-one".