126332221 has 8 divisors (see below), whose sum is σ = 127752120. Its totient is φ = 124919808.

The previous prime is 126332191. The next prime is 126332279. The reversal of 126332221 is 122233621.

It can be written as a sum of positive squares in 4 ways, for example, as 5112121 + 121220100 = 2261^2 + 11010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126332221 - 2²³ = 117943613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126332192 and 126332201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126332291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36285 + ... + 39613.

It is an arithmetic number, because the mean of its divisors is an integer number (15969015).

Almost surely, 2^126332221 is an apocalyptic number.

It is an amenable number.

126332221 is a deficient number, since it is larger than the sum of its proper divisors (1419899).

126332221 is a wasteful number, since it uses less digits than its factorization.

126332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743.

The product of its digits is 864, while the sum is 22.

The square root of 126332221 is about 11239.7607180936. The cubic root of 126332221 is about 501.7700213218.

Adding to 126332221 its reverse (122233621), we get a palindrome (248565842).

The spelling of 126332221 in words is "one hundred twenty-six million, three hundred thirty-two thousand, two hundred twenty-one".