125499169 has 2 divisors, whose sum is σ = 125499170. Its totient is φ = 125499168.

The previous prime is 125499131. The next prime is 125499173. The reversal of 125499169 is 961994521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123210000 + 2289169 = 11100^2 + 1513^2 .

It is a cyclic number.

It is not a de Polignac number, because 125499169 - 2¹¹ = 125497121 is a prime.

It is a super-2 number, since 2×125499169² = 31500082839381122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125499119) 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, 62749584 + 62749585.

It is an arithmetic number, because the mean of its divisors is an integer number (62749585).

Almost surely, 2^125499169 is an apocalyptic number.

It is an amenable number.

125499169 is a deficient number, since it is larger than the sum of its proper divisors (1).

125499169 is an equidigital number, since it uses as much as digits as its factorization.

125499169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 46.

The square root of 125499169 is about 11202.6411617975. The cubic root of 125499169 is about 500.6646746902.

The spelling of 125499169 in words is "one hundred twenty-five million, four hundred ninety-nine thousand, one hundred sixty-nine".