52421857 has 2 divisors, whose sum is σ = 52421858. Its totient is φ = 52421856.

The previous prime is 52421851. The next prime is 52421867. The reversal of 52421857 is 75812425.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39237696 + 13184161 = 6264^2 + 3631^2 .

It is a cyclic number.

It is not a de Polignac number, because 52421857 - 2⁷ = 52421729 is a prime.

It is not a weakly prime, because it can be changed into another prime (52421851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26210928 + 26210929.

It is an arithmetic number, because the mean of its divisors is an integer number (26210929).

Almost surely, 2^52421857 is an apocalyptic number.

It is an amenable number.

52421857 is a deficient number, since it is larger than the sum of its proper divisors (1).

52421857 is an equidigital number, since it uses as much as digits as its factorization.

52421857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 34.

The square root of 52421857 is about 7240.2939857439. The cubic root of 52421857 is about 374.2577483954.

The spelling of 52421857 in words is "fifty-two million, four hundred twenty-one thousand, eight hundred fifty-seven".