126665420 has 48 divisors (see below), whose sum is σ = 308302848. Its totient is φ = 42813120.

The previous prime is 126665369. The next prime is 126665449. The reversal of 126665420 is 24566621.

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 15 ways as a sum of consecutive naturals, for example, 3569 + ... + 16311.

It is an arithmetic number, because the mean of its divisors is an integer number (6422976).

Almost surely, 2^126665420 is an apocalyptic number.

126665420 is a gapful number since it is divisible by the number (10) 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 126665420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154151424).

126665420 is an abundant number, since it is smaller than the sum of its proper divisors (181637428).

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

126665420 is a wasteful number, since it uses less digits than its factorization.

126665420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12830 (or 12828 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 126665420 is about 11254.5732926664. The cubic root of 126665420 is about 502.2107705800.

The spelling of 126665420 in words is "one hundred twenty-six million, six hundred sixty-five thousand, four hundred twenty".