126211566 has 48 divisors (see below), whose sum is σ = 287763840. Its totient is φ = 36784800.

The previous prime is 126211559. The next prime is 126211573. The reversal of 126211566 is 665112621.

It is an interprime number because it is at equal distance from previous prime (126211559) and next prime (126211573).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15991 + ... + 22541.

It is an arithmetic number, because the mean of its divisors is an integer number (5995080).

Almost surely, 2^126211566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126211566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143881920).

126211566 is an abundant number, since it is smaller than the sum of its proper divisors (161552274).

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

126211566 is a wasteful number, since it uses less digits than its factorization.

126211566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601 (or 6588 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 126211566 is about 11234.3921063848. The cubic root of 126211566 is about 501.6102300847.

The spelling of 126211566 in words is "one hundred twenty-six million, two hundred eleven thousand, five hundred sixty-six".