125000819 has 2 divisors, whose sum is σ = 125000820. Its totient is φ = 125000818.

The previous prime is 125000809. The next prime is 125000833. The reversal of 125000819 is 918000521.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (918000521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125000819 is a prime.

It is a super-2 number, since 2×125000819² = 31250409501341522, which contains 22 as substring.

125000819 is a modest number, since divided by 819 gives 125 as remainder.

It is not a weakly prime, because it can be changed into another prime (125000809) 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, 62500409 + 62500410.

It is an arithmetic number, because the mean of its divisors is an integer number (62500410).

Almost surely, 2^125000819 is an apocalyptic number.

125000819 is a deficient number, since it is larger than the sum of its proper divisors (1).

125000819 is an equidigital number, since it uses as much as digits as its factorization.

125000819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 125000819 is about 11180.3765142324. The cubic root of 125000819 is about 500.0010919976.

The spelling of 125000819 in words is "one hundred twenty-five million, eight hundred nineteen", and thus it is an aban number.