252420847 has 4 divisors (see below), whose sum is σ = 288480976. Its totient is φ = 216360720.

The previous prime is 252420841. The next prime is 252420851. The reversal of 252420847 is 748024252.

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

It is a cyclic number.

It is not a de Polignac number, because 252420847 - 2¹⁹ = 251896559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252420841) 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, 18030054 + ... + 18030067.

It is an arithmetic number, because the mean of its divisors is an integer number (72120244).

Almost surely, 2^252420847 is an apocalyptic number.

252420847 is a deficient number, since it is larger than the sum of its proper divisors (36060129).

252420847 is an equidigital number, since it uses as much as digits as its factorization.

252420847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36060128.

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 252420847 is about 15887.7577713156. The cubic root of 252420847 is about 631.9873807433.

The spelling of 252420847 in words is "two hundred fifty-two million, four hundred twenty thousand, eight hundred forty-seven".