125147819 has 2 divisors, whose sum is σ = 125147820. Its totient is φ = 125147818.

The previous prime is 125147797. The next prime is 125147821. The reversal of 125147819 is 918741521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125147819 - 2¹⁶ = 125082283 is a prime.

It is a super-4 number, since 4×125147819⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 125147821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125147879) 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 as a sum of consecutive naturals, namely, 62573909 + 62573910.

It is an arithmetic number, because the mean of its divisors is an integer number (62573910).

Almost surely, 2^125147819 is an apocalyptic number.

125147819 is a deficient number, since it is larger than the sum of its proper divisors (1).

125147819 is an equidigital number, since it uses as much as digits as its factorization.

125147819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 125147819 is about 11186.9486009367. The cubic root of 125147819 is about 500.1970143605.

The spelling of 125147819 in words is "one hundred twenty-five million, one hundred forty-seven thousand, eight hundred nineteen".