126140281 has 4 divisors (see below), whose sum is σ = 126165364. Its totient is φ = 126115200.

The previous prime is 126140279. The next prime is 126140291. The reversal of 126140281 is 182041621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72250000 + 53890281 = 8500^2 + 7341^2 .

It is a cyclic number.

It is not a de Polignac number, because 126140281 - 2¹ = 126140279 is a prime.

It is a super-2 number, since 2×126140281² = 31822740981517922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126140291) 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 3 ways as a sum of consecutive naturals, for example, 2100 + ... + 16021.

It is an arithmetic number, because the mean of its divisors is an integer number (31541341).

Almost surely, 2^126140281 is an apocalyptic number.

It is an amenable number.

126140281 is a deficient number, since it is larger than the sum of its proper divisors (25083).

126140281 is an equidigital number, since it uses as much as digits as its factorization.

126140281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25082.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 126140281 is about 11231.2190344593. The cubic root of 126140281 is about 501.5157748762.

The spelling of 126140281 in words is "one hundred twenty-six million, one hundred forty thousand, two hundred eighty-one".