125497778 has 8 divisors (see below), whose sum is σ = 215139072. Its totient is φ = 53784756.

The previous prime is 125497777. The next prime is 125497781. The reversal of 125497778 is 877794521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (125497777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4482050 + ... + 4482077.

It is an arithmetic number, because the mean of its divisors is an integer number (26892384).

Almost surely, 2^125497778 is an apocalyptic number.

125497778 is a deficient number, since it is larger than the sum of its proper divisors (89641294).

125497778 is an equidigital number, since it uses as much as digits as its factorization.

125497778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8964136.

The product of its digits is 987840, while the sum is 50.

The square root of 125497778 is about 11202.5790780516. The cubic root of 125497778 is about 500.6628249379.

The spelling of 125497778 in words is "one hundred twenty-five million, four hundred ninety-seven thousand, seven hundred seventy-eight".