126851820 has 24 divisors (see below), whose sum is σ = 355185264. Its totient is φ = 33827136.

The previous prime is 126851819. The next prime is 126851821. The reversal of 126851820 is 28158621.

It is an interprime number because it is at equal distance from previous prime (126851819) and next prime (126851821).

It is not an unprimeable number, because it can be changed into a prime (126851821) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1057039 + ... + 1057158.

It is an arithmetic number, because the mean of its divisors is an integer number (14799386).

Almost surely, 2^126851820 is an apocalyptic number.

126851820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126851820 is an abundant number, since it is smaller than the sum of its proper divisors (228333444).

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

126851820 is a wasteful number, since it uses less digits than its factorization.

126851820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114209 (or 2114207 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 126851820 is about 11262.8513263738. The cubic root of 126851820 is about 502.4569998600.

The spelling of 126851820 in words is "one hundred twenty-six million, eight hundred fifty-one thousand, eight hundred twenty".