126999684 has 96 divisors (see below), whose sum is σ = 388505600. Its totient is φ = 35108640.

The previous prime is 126999661. The next prime is 126999709. The reversal of 126999684 is 486999621.

It is a super-3 number, since 3×126999684³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 126999684.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 20727 + ... + 26145.

Almost surely, 2^126999684 is an apocalyptic number.

126999684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126999684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194252800).

126999684 is an abundant number, since it is smaller than the sum of its proper divisors (261505916).

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

126999684 is a wasteful number, since it uses less digits than its factorization.

126999684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470 (or 5462 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 126999684 is about 11269.4136493431. The cubic root of 126999684 is about 502.6521526328.

The spelling of 126999684 in words is "one hundred twenty-six million, nine hundred ninety-nine thousand, six hundred eighty-four".