761221 has 4 divisors (see below), whose sum is σ = 787500. Its totient is φ = 734944.

The previous prime is 761213. The next prime is 761227. The reversal of 761221 is 122167.

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

It can be written as a sum of positive squares in 2 ways, for example, as 497025 + 264196 = 705^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 761221 - 2³ = 761213 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 (761227) 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, 13096 + ... + 13153.

It is an arithmetic number, because the mean of its divisors is an integer number (196875).

2⁷⁶¹²²¹ is an apocalyptic number.

It is an amenable number.

761221 is a deficient number, since it is larger than the sum of its proper divisors (26279).

761221 is a wasteful number, since it uses less digits than its factorization.

761221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26278.

The product of its digits is 168, while the sum is 19.

The square root of 761221 is about 872.4797991931. The cubic root of 761221 is about 91.3068976481.

Adding to 761221 its reverse (122167), we get a palindrome (883388).

The spelling of 761221 in words is "seven hundred sixty-one thousand, two hundred twenty-one".