392221 has 2 divisors, whose sum is σ = 392222. Its totient is φ = 392220.

The previous prime is 392213. The next prime is 392233. The reversal of 392221 is 122293.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236196 + 156025 = 486^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 392221 - 2³ = 392213 is a prime.

392221 is a lucky number.

It is equal to p₃₃₂₄₇ and since 392221 and 33247 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (392201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196110 + 196111.

It is an arithmetic number, because the mean of its divisors is an integer number (196111).

2³⁹²²²¹ is an apocalyptic number.

It is an amenable number.

392221 is a deficient number, since it is larger than the sum of its proper divisors (1).

392221 is an equidigital number, since it uses as much as digits as its factorization.

392221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 392221 is about 626.2754984829. The cubic root of 392221 is about 73.1998651296.

The spelling of 392221 in words is "three hundred ninety-two thousand, two hundred twenty-one".