52421249 has 4 divisors (see below), whose sum is σ = 52724436. Its totient is φ = 52118064.

The previous prime is 52421233. The next prime is 52421273. The reversal of 52421249 is 94212425.

52421249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 32126224 + 20295025 = 5668^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 52421249 - 2⁴ = 52421233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52421219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151334 + ... + 151679.

It is an arithmetic number, because the mean of its divisors is an integer number (13181109).

Almost surely, 2^52421249 is an apocalyptic number.

It is an amenable number.

52421249 is a deficient number, since it is larger than the sum of its proper divisors (303187).

52421249 is a wasteful number, since it uses less digits than its factorization.

52421249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303186.

The product of its digits is 5760, while the sum is 29.

The square root of 52421249 is about 7240.2519983769. The cubic root of 52421249 is about 374.2563014825.

The spelling of 52421249 in words is "fifty-two million, four hundred twenty-one thousand, two hundred forty-nine".