126991452 has 96 divisors (see below), whose sum is σ = 348364800. Its totient is φ = 35259840.

The previous prime is 126991451. The next prime is 126991477. The reversal of 126991452 is 254199621.

It is a super-2 number, since 2×126991452² = 32253657762136608, 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 126991452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126991451) 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, 638049 + ... + 638247.

It is an arithmetic number, because the mean of its divisors is an integer number (3628800).

Almost surely, 2^126991452 is an apocalyptic number.

126991452 is a gapful number since it is divisible by the number (12) 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 126991452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174182400).

126991452 is an abundant number, since it is smaller than the sum of its proper divisors (221373348).

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

126991452 is a wasteful number, since it uses less digits than its factorization.

126991452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 126991452 is about 11269.0484070306. The cubic root of 126991452 is about 502.6412919183.

The spelling of 126991452 in words is "one hundred twenty-six million, nine hundred ninety-one thousand, four hundred fifty-two".