125234809 has 4 divisors (see below), whose sum is σ = 143125504. Its totient is φ = 107344116.

The previous prime is 125234807. The next prime is 125234819. The reversal of 125234809 is 908432521.

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 125234809 - 2¹ = 125234807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125234807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8945337 + ... + 8945350.

It is an arithmetic number, because the mean of its divisors is an integer number (35781376).

Almost surely, 2^125234809 is an apocalyptic number.

It is an amenable number.

125234809 is a deficient number, since it is larger than the sum of its proper divisors (17890695).

125234809 is an equidigital number, since it uses as much as digits as its factorization.

125234809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17890694.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 125234809 is about 11190.8359383917. The cubic root of 125234809 is about 500.3128828345.

The spelling of 125234809 in words is "one hundred twenty-five million, two hundred thirty-four thousand, eight hundred nine".