252110421 has 32 divisors (see below), whose sum is σ = 380851200. Its totient is φ = 164792880.

The previous prime is 252110401. The next prime is 252110423. The reversal of 252110421 is 124011252.

It is not a de Polignac number, because 252110421 - 2⁷ = 252110293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252110394 and 252110403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252110423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665010 + ... + 665388.

It is an arithmetic number, because the mean of its divisors is an integer number (11901600).

Almost surely, 2^252110421 is an apocalyptic number.

It is an amenable number.

252110421 is a deficient number, since it is larger than the sum of its proper divisors (128740779).

252110421 is a wasteful number, since it uses less digits than its factorization.

252110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 252110421 is about 15877.9854200714. The cubic root of 252110421 is about 631.7282027415.

Adding to 252110421 its reverse (124011252), we get a palindrome (376121673).

The spelling of 252110421 in words is "two hundred fifty-two million, one hundred ten thousand, four hundred twenty-one".