252021043 has 4 divisors (see below), whose sum is σ = 252199080. Its totient is φ = 251843008.

The previous prime is 252021013. The next prime is 252021047. The reversal of 252021043 is 340120252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252021043 is a prime.

It is a super-2 number, since 2×252021043² = 127029212229615698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252021043.

It is not an unprimeable number, because it can be changed into a prime (252021047) 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, 86878 + ... + 89731.

It is an arithmetic number, because the mean of its divisors is an integer number (63049770).

Almost surely, 2^252021043 is an apocalyptic number.

252021043 is a deficient number, since it is larger than the sum of its proper divisors (178037).

252021043 is a wasteful number, since it uses less digits than its factorization.

252021043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178036.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 252021043 is about 15875.1706447521. The cubic root of 252021043 is about 631.6535406460.

Adding to 252021043 its reverse (340120252), we get a palindrome (592141295).

The spelling of 252021043 in words is "two hundred fifty-two million, twenty-one thousand, forty-three".