126212899 has 4 divisors (see below), whose sum is σ = 126369720. Its totient is φ = 126056080.

The previous prime is 126212893. The next prime is 126212909. The reversal of 126212899 is 998212621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126212899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126212893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77197 + ... + 78814.

It is an arithmetic number, because the mean of its divisors is an integer number (31592430).

Almost surely, 2^126212899 is an apocalyptic number.

126212899 is a deficient number, since it is larger than the sum of its proper divisors (156821).

126212899 is an equidigital number, since it uses as much as digits as its factorization.

126212899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156820.

The product of its digits is 31104, while the sum is 40.

The square root of 126212899 is about 11234.4514329806. The cubic root of 126212899 is about 501.6119960192.

It can be divided in two parts, 1262 and 12899, that added together give a square (14161 = 119²).

The spelling of 126212899 in words is "one hundred twenty-six million, two hundred twelve thousand, eight hundred ninety-nine".