126889749 has 24 divisors (see below), whose sum is σ = 209797952. Its totient is φ = 72394560.

The previous prime is 126889747. The next prime is 126889753. The reversal of 126889749 is 947988621.

It is not a de Polignac number, because 126889749 - 2¹ = 126889747 is a prime.

It is a super-2 number, since 2×126889749² = 32202016802566002, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 126889695 and 126889704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126889747) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 54489 + ... + 56769.

Almost surely, 2^126889749 is an apocalyptic number.

It is an amenable number.

126889749 is a deficient number, since it is larger than the sum of its proper divisors (82908203).

126889749 is a wasteful number, since it uses less digits than its factorization.

126889749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3174 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 126889749 is about 11264.5350103766. The cubic root of 126889749 is about 502.5070734877.

The spelling of 126889749 in words is "one hundred twenty-six million, eight hundred eighty-nine thousand, seven hundred forty-nine".