126398209 has 8 divisors (see below), whose sum is σ = 145205120. Its totient is φ = 107778816.

The previous prime is 126398189. The next prime is 126398219. The reversal of 126398209 is 902893621.

It is a happy number.

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 126398209 - 2⁹ = 126397697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126398219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45429 + ... + 48130.

It is an arithmetic number, because the mean of its divisors is an integer number (18150640).

Almost surely, 2^126398209 is an apocalyptic number.

It is an amenable number.

126398209 is a deficient number, since it is larger than the sum of its proper divisors (18806911).

126398209 is an equidigital number, since it uses as much as digits as its factorization.

126398209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93759.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 126398209 is about 11242.6958066115. The cubic root of 126398209 is about 501.8573704730.

The spelling of 126398209 in words is "one hundred twenty-six million, three hundred ninety-eight thousand, two hundred nine".