125999489 has 16 divisors (see below), whose sum is σ = 158069760. Its totient is φ = 97569360.

The previous prime is 125999483. The next prime is 125999491. The reversal of 125999489 is 984999521.

It is not a de Polignac number, because 125999489 - 2¹⁶ = 125933953 is a prime.

It is a super-2 number, since 2×125999489² = 31751742456522242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125999483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7532 + ... + 17570.

It is an arithmetic number, because the mean of its divisors is an integer number (9879360).

Almost surely, 2^125999489 is an apocalyptic number.

It is an amenable number.

125999489 is a deficient number, since it is larger than the sum of its proper divisors (32070271).

125999489 is a wasteful number, since it uses less digits than its factorization.

125999489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220.

The product of its digits is 2099520, while the sum is 56.

The square root of 125999489 is about 11224.9493985496. The cubic root of 125999489 is about 501.3291157719.

The spelling of 125999489 in words is "one hundred twenty-five million, nine hundred ninety-nine thousand, four hundred eighty-nine".