252489071 has 4 divisors (see below), whose sum is σ = 255531192. Its totient is φ = 249446952.

The previous prime is 252489067. The next prime is 252489091. The reversal of 252489071 is 170984252.

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 252489071 - 2² = 252489067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252489091) 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, 1520936 + ... + 1521101.

It is an arithmetic number, because the mean of its divisors is an integer number (63882798).

Almost surely, 2^252489071 is an apocalyptic number.

252489071 is a deficient number, since it is larger than the sum of its proper divisors (3042121).

252489071 is an equidigital number, since it uses as much as digits as its factorization.

252489071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042120.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 252489071 is about 15889.9046881975. The cubic root of 252489071 is about 632.0443132084.

The spelling of 252489071 in words is "two hundred fifty-two million, four hundred eighty-nine thousand, seventy-one".