126410809 has 4 divisors (see below), whose sum is σ = 144469504. Its totient is φ = 108352116.

The previous prime is 126410807. The next prime is 126410881. The reversal of 126410809 is 908014621.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 908014621 = 29 ⋅31310849.

It is a cyclic number.

It is not a de Polignac number, because 126410809 - 2¹ = 126410807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126410803) 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, 9029337 + ... + 9029350.

It is an arithmetic number, because the mean of its divisors is an integer number (36117376).

Almost surely, 2^126410809 is an apocalyptic number.

It is an amenable number.

126410809 is a deficient number, since it is larger than the sum of its proper divisors (18058695).

126410809 is an equidigital number, since it uses as much as digits as its factorization.

126410809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18058694.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 126410809 is about 11243.2561564700. The cubic root of 126410809 is about 501.8740457957.

The spelling of 126410809 in words is "one hundred twenty-six million, four hundred ten thousand, eight hundred nine".