126143409 has 16 divisors (see below), whose sum is σ = 192376832. Its totient is φ = 72022608.

The previous prime is 126143393. The next prime is 126143453. The reversal of 126143409 is 904341621.

It is not a de Polignac number, because 126143409 - 2⁴ = 126143393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126143609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43602 + ... + 46404.

It is an arithmetic number, because the mean of its divisors is an integer number (12023552).

Almost surely, 2^126143409 is an apocalyptic number.

It is an amenable number.

126143409 is a deficient number, since it is larger than the sum of its proper divisors (66233423).

126143409 is a wasteful number, since it uses less digits than its factorization.

126143409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4956.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 126143409 is about 11231.3582882926. The cubic root of 126143409 is about 501.5199203360.

The spelling of 126143409 in words is "one hundred twenty-six million, one hundred forty-three thousand, four hundred nine".