210252420 has 72 divisors (see below), whose sum is σ = 728879424. Its totient is φ = 48057408.

The previous prime is 210252403. The next prime is 210252439. The reversal of 210252420 is 24252012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210252393 and 210252402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82174 + ... + 84693.

Almost surely, 2^210252420 is an apocalyptic number.

210252420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210252420 is an abundant number, since it is smaller than the sum of its proper divisors (518627004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210252420 is a wasteful number, since it uses less digits than its factorization.

210252420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166889 (or 166884 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 210252420 is about 14500.0834480357. The cubic root of 210252420 is about 594.6302530595.

The spelling of 210252420 in words is "two hundred ten million, two hundred fifty-two thousand, four hundred twenty".