126106989 has 32 divisors (see below), whose sum is σ = 178168320. Its totient is φ = 79252992.

The previous prime is 126106979. The next prime is 126106991. The reversal of 126106989 is 989601621.

It is not a de Polignac number, because 126106989 - 2⁵ = 126106957 is a prime.

It is a super-2 number, since 2×126106989² = 31805945349292242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126106989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126106979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640039 + ... + 640235.

It is an arithmetic number, because the mean of its divisors is an integer number (5567760).

Almost surely, 2^126106989 is an apocalyptic number.

It is an amenable number.

126106989 is a deficient number, since it is larger than the sum of its proper divisors (52061331).

126106989 is a wasteful number, since it uses less digits than its factorization.

126106989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 126106989 is about 11229.7368179312. The cubic root of 126106989 is about 501.4716495787.

The spelling of 126106989 in words is "one hundred twenty-six million, one hundred six thousand, nine hundred eighty-nine".