252421013 has 8 divisors (see below), whose sum is σ = 273411768. Its totient is φ = 231655104.

The previous prime is 252421007. The next prime is 252421019. The reversal of 252421013 is 310124252.

It is an interprime number because it is at equal distance from previous prime (252421007) and next prime (252421019).

It can be written as a sum of positive squares in 4 ways, for example, as 23746129 + 228674884 = 4873^2 + 15122^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252421013 - 2¹⁴ = 252404629 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 (252421019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53870 + ... + 58367.

It is an arithmetic number, because the mean of its divisors is an integer number (34176471).

Almost surely, 2^252421013 is an apocalyptic number.

It is an amenable number.

252421013 is a deficient number, since it is larger than the sum of its proper divisors (20990755).

252421013 is a wasteful number, since it uses less digits than its factorization.

252421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112423.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 252421013 is about 15887.7629954629. The cubic root of 252421013 is about 631.9875192817.

Adding to 252421013 its reverse (310124252), we get a palindrome (562545265).

The spelling of 252421013 in words is "two hundred fifty-two million, four hundred twenty-one thousand, thirteen".