125730019 has 4 divisors (see below), whose sum is σ = 126110200. Its totient is φ = 125349840.

The previous prime is 125729953. The next prime is 125730037. The reversal of 125730019 is 910037521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125730019 - 2⁹ = 125729507 is a prime.

It is a super-2 number, since 2×125730019² = 31616075355480722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125731019) 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, 189594 + ... + 190255.

It is an arithmetic number, because the mean of its divisors is an integer number (31527550).

Almost surely, 2^125730019 is an apocalyptic number.

125730019 is a deficient number, since it is larger than the sum of its proper divisors (380181).

125730019 is an equidigital number, since it uses as much as digits as its factorization.

125730019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380180.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 125730019 is about 11212.9398018539. The cubic root of 125730019 is about 500.9714699366.

The spelling of 125730019 in words is "one hundred twenty-five million, seven hundred thirty thousand, nineteen".