126212969 has 2 divisors, whose sum is σ = 126212970. Its totient is φ = 126212968.

The previous prime is 126212951. The next prime is 126212971. The reversal of 126212969 is 969212621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116208400 + 10004569 = 10780^2 + 3163^2 .

It is a cyclic number.

It is not a de Polignac number, because 126212969 - 2²⁰ = 125164393 is a prime.

It is a super-2 number, since 2×126212969² = 31859427087589922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 126212971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (126212909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63106484 + 63106485.

It is an arithmetic number, because the mean of its divisors is an integer number (63106485).

Almost surely, 2^126212969 is an apocalyptic number.

It is an amenable number.

126212969 is a deficient number, since it is larger than the sum of its proper divisors (1).

126212969 is an equidigital number, since it uses as much as digits as its factorization.

126212969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 126212969 is about 11234.4545483971. The cubic root of 126212969 is about 501.6120887536.

The spelling of 126212969 in words is "one hundred twenty-six million, two hundred twelve thousand, nine hundred sixty-nine".