126221452 has 72 divisors (see below), whose sum is σ = 267457680. Its totient is φ = 51932160.

The previous prime is 126221443. The next prime is 126221477. The reversal of 126221452 is 254122621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 907999 + ... + 908137.

It is an arithmetic number, because the mean of its divisors is an integer number (3714690).

Almost surely, 2^126221452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126221452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133728840).

126221452 is an abundant number, since it is smaller than the sum of its proper divisors (141236228).

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

126221452 is a wasteful number, since it uses less digits than its factorization.

126221452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 302 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 126221452 is about 11234.8320859726. The cubic root of 126221452 is about 501.6233265846.

The spelling of 126221452 in words is "one hundred twenty-six million, two hundred twenty-one thousand, four hundred fifty-two".