126205720 has 64 divisors (see below), whose sum is σ = 294516000. Its totient is φ = 48642048.

The previous prime is 126205697. The next prime is 126205721. The reversal of 126205720 is 27502621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126205721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124576 + ... + 125584.

Almost surely, 2^126205720 is an apocalyptic number.

126205720 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 126205720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147258000).

126205720 is an abundant number, since it is smaller than the sum of its proper divisors (168310280).

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

126205720 is a wasteful number, since it uses less digits than its factorization.

126205720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 126205720 is about 11234.1319201797. The cubic root of 126205720 is about 501.6024852618.

The spelling of 126205720 in words is "one hundred twenty-six million, two hundred five thousand, seven hundred twenty".