125120999 has 2 divisors, whose sum is σ = 125121000. Its totient is φ = 125120998.

The previous prime is 125120981. The next prime is 125121019. The reversal of 125120999 is 999021521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125120999 - 2¹² = 125116903 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125120399) 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, 62560499 + 62560500.

It is an arithmetic number, because the mean of its divisors is an integer number (62560500).

Almost surely, 2^125120999 is an apocalyptic number.

125120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

125120999 is an equidigital number, since it uses as much as digits as its factorization.

125120999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 125120999 is about 11185.7498184073. The cubic root of 125120999 is about 500.1612799719.

The spelling of 125120999 in words is "one hundred twenty-five million, one hundred twenty thousand, nine hundred ninety-nine".