125009890 has 8 divisors (see below), whose sum is σ = 225017820. Its totient is φ = 50003952.

The previous prime is 125009879. The next prime is 125009893. The reversal of 125009890 is 98900521.

It can be written as a sum of positive squares in 2 ways, for example, as 114126489 + 10883401 = 10683^2 + 3299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (125009893) 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, 6250485 + ... + 6250504.

Almost surely, 2^125009890 is an apocalyptic number.

125009890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125009890 is a deficient number, since it is larger than the sum of its proper divisors (100007930).

125009890 is a wasteful number, since it uses less digits than its factorization.

125009890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12500996.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 125009890 is about 11180.7821729967. The cubic root of 125009890 is about 500.0131863189.

The spelling of 125009890 in words is "one hundred twenty-five million, nine thousand, eight hundred ninety".