125443409 has 8 divisors (see below), whose sum is σ = 154392000. Its totient is φ = 99251856.

The previous prime is 125443397. The next prime is 125443411. The reversal of 125443409 is 904344521.

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 125443409 - 2⁴ = 125443393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125443609) 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, 689159 + ... + 689340.

It is an arithmetic number, because the mean of its divisors is an integer number (19299000).

Almost surely, 2^125443409 is an apocalyptic number.

It is an amenable number.

125443409 is a deficient number, since it is larger than the sum of its proper divisors (28948591).

125443409 is a wasteful number, since it uses less digits than its factorization.

125443409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378519.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 125443409 is about 11200.1521864660. The cubic root of 125443409 is about 500.5905143111.

The spelling of 125443409 in words is "one hundred twenty-five million, four hundred forty-three thousand, four hundred nine".