126530909 has 4 divisors (see below), whose sum is σ = 129223104. Its totient is φ = 123838716.

The previous prime is 126530893. The next prime is 126530917. The reversal of 126530909 is 909035621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126530909 - 2⁴ = 126530893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126530939) 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, 1346027 + ... + 1346120.

It is an arithmetic number, because the mean of its divisors is an integer number (32305776).

Almost surely, 2^126530909 is an apocalyptic number.

It is an amenable number.

126530909 is a deficient number, since it is larger than the sum of its proper divisors (2692195).

126530909 is an equidigital number, since it uses as much as digits as its factorization.

126530909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692194.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 126530909 is about 11248.5958679295. The cubic root of 126530909 is about 502.0329351470.

The spelling of 126530909 in words is "one hundred twenty-six million, five hundred thirty thousand, nine hundred nine".