126157217 has 2 divisors, whose sum is σ = 126157218. Its totient is φ = 126157216.

The previous prime is 126157189. The next prime is 126157247. The reversal of 126157217 is 712751621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121793296 + 4363921 = 11036^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 126157217 - 2¹⁰ = 126156193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126157247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63078608 + 63078609.

It is an arithmetic number, because the mean of its divisors is an integer number (63078609).

Almost surely, 2^126157217 is an apocalyptic number.

It is an amenable number.

126157217 is a deficient number, since it is larger than the sum of its proper divisors (1).

126157217 is an equidigital number, since it uses as much as digits as its factorization.

126157217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The square root of 126157217 is about 11231.9729789561. The cubic root of 126157217 is about 501.5382189123.

The spelling of 126157217 in words is "one hundred twenty-six million, one hundred fifty-seven thousand, two hundred seventeen".