126969138 has 24 divisors (see below), whose sum is σ = 275515500. Its totient is φ = 42259104.

The previous prime is 126969127. The next prime is 126969181. The reversal of 126969138 is 831969621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118657449 + 8311689 = 10893^2 + 2883^2 .

It is a super-2 number, since 2×126969138² = 32242324008926088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126969093 and 126969102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7788 + ... + 17736.

Almost surely, 2^126969138 is an apocalyptic number.

126969138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

126969138 is an abundant number, since it is smaller than the sum of its proper divisors (148546362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126969138 is a wasteful number, since it uses less digits than its factorization.

126969138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10666 (or 10663 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 126969138 is about 11268.0583065584. The cubic root of 126969138 is about 502.6118500554.

It can be divided in two parts, 1269 and 69138, that added together give a palindrome (70407).

The spelling of 126969138 in words is "one hundred twenty-six million, nine hundred sixty-nine thousand, one hundred thirty-eight".