126030281 has 4 divisors (see below), whose sum is σ = 135724932. Its totient is φ = 116335632.

The previous prime is 126030277. The next prime is 126030293. The reversal of 126030281 is 182030621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182030621 = 19 ⋅9580559.

It can be written as a sum of positive squares in 2 ways, for example, as 73685056 + 52345225 = 8584^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 126030281 - 2² = 126030277 is a prime.

It is a super-2 number, since 2×126030281² = 31767263457877922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126030241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4847306 + ... + 4847331.

It is an arithmetic number, because the mean of its divisors is an integer number (33931233).

Almost surely, 2^126030281 is an apocalyptic number.

It is an amenable number.

126030281 is a deficient number, since it is larger than the sum of its proper divisors (9694651).

126030281 is an equidigital number, since it uses as much as digits as its factorization.

126030281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694650.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 126030281 is about 11226.3209022368. The cubic root of 126030281 is about 501.3699510402.

The spelling of 126030281 in words is "one hundred twenty-six million, thirty thousand, two hundred eighty-one".