125678429 has 4 divisors (see below), whose sum is σ = 125760000. Its totient is φ = 125596860.

The previous prime is 125678419. The next prime is 125678447. The reversal of 125678429 is 924876521.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125678429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125678429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125678419) 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, 38429 + ... + 41570.

It is an arithmetic number, because the mean of its divisors is an integer number (31440000).

Almost surely, 2^125678429 is an apocalyptic number.

It is an amenable number.

125678429 is a deficient number, since it is larger than the sum of its proper divisors (81571).

125678429 is an equidigital number, since it uses as much as digits as its factorization.

125678429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81570.

The product of its digits is 241920, while the sum is 44.

The square root of 125678429 is about 11210.6390986420. The cubic root of 125678429 is about 500.9029404157.

The spelling of 125678429 in words is "one hundred twenty-five million, six hundred seventy-eight thousand, four hundred twenty-nine".