122456889 has 12 divisors (see below), whose sum is σ = 177056100. Its totient is φ = 81557664.

The previous prime is 122456863. The next prime is 122456891. The reversal of 122456889 is 988654221.

122456889 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 568 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54641664 + 67815225 = 7392^2 + 8235^2 .

It is not a de Polignac number, because 122456889 - 2¹⁵ = 122424121 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122456809) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3847 + ... + 16115.

It is an arithmetic number, because the mean of its divisors is an integer number (14754675).

Almost surely, 2^122456889 is an apocalyptic number.

It is an amenable number.

122456889 is a deficient number, since it is larger than the sum of its proper divisors (54599211).

122456889 is a wasteful number, since it uses less digits than its factorization.

122456889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384 (or 13381 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 122456889 is about 11066.0240827499. The cubic root of 122456889 is about 496.5859265977.

The spelling of 122456889 in words is "one hundred twenty-two million, four hundred fifty-six thousand, eight hundred eighty-nine".