126056321 has 4 divisors (see below), whose sum is σ = 126079812. Its totient is φ = 126032832.

The previous prime is 126056291. The next prime is 126056339. The reversal of 126056321 is 123650621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123650621 = 571 ⋅216551.

It can be written as a sum of positive squares in 2 ways, for example, as 124567921 + 1488400 = 11161^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 126056321 - 2⁶ = 126056257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126050321) 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, 701 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (31519953).

Almost surely, 2^126056321 is an apocalyptic number.

It is an amenable number.

126056321 is a deficient number, since it is larger than the sum of its proper divisors (23491).

126056321 is an equidigital number, since it uses as much as digits as its factorization.

126056321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23490.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 126056321 is about 11227.4806167724. The cubic root of 126056321 is about 501.4044791826.

The spelling of 126056321 in words is "one hundred twenty-six million, fifty-six thousand, three hundred twenty-one".