126215017 has 2 divisors, whose sum is σ = 126215018. Its totient is φ = 126215016.

The previous prime is 126215009. The next prime is 126215027. The reversal of 126215017 is 710512621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120758121 + 5456896 = 10989^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 126215017 - 2³ = 126215009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126214982 and 126215000.

It is not a weakly prime, because it can be changed into another prime (126215027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63107508 + 63107509.

It is an arithmetic number, because the mean of its divisors is an integer number (63107509).

Almost surely, 2^126215017 is an apocalyptic number.

It is an amenable number.

126215017 is a deficient number, since it is larger than the sum of its proper divisors (1).

126215017 is an equidigital number, since it uses as much as digits as its factorization.

126215017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 126215017 is about 11234.5456961997. The cubic root of 126215017 is about 501.6148018821.

Adding to 126215017 its reverse (710512621), we get a palindrome (836727638).

The spelling of 126215017 in words is "one hundred twenty-six million, two hundred fifteen thousand, seventeen".