126021312 has 112 divisors (see below), whose sum is σ = 373258080. Its totient is φ = 41693184.

The previous prime is 126021277. The next prime is 126021317. The reversal of 126021312 is 213120621.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (126021317) 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 15 ways as a sum of consecutive naturals, for example, 402468 + ... + 402780.

Almost surely, 2^126021312 is an apocalyptic number.

126021312 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 126021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186629040).

126021312 is an abundant number, since it is smaller than the sum of its proper divisors (247236768).

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

126021312 is a wasteful number, since it uses less digits than its factorization.

126021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 126021312 is about 11225.9214321142. The cubic root of 126021312 is about 501.3580573542.

Adding to 126021312 its reverse (213120621), we get a palindrome (339141933).

The spelling of 126021312 in words is "one hundred twenty-six million, twenty-one thousand, three hundred twelve".