252520420 has 24 divisors (see below), whose sum is σ = 547400448. Its totient is φ = 97749600.

The previous prime is 252520417. The next prime is 252520421. The reversal of 252520420 is 24025252.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 252520391 and 252520400.

It is not an unprimeable number, because it can be changed into a prime (252520421) 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, 203026 + ... + 204265.

It is an arithmetic number, because the mean of its divisors is an integer number (22808352).

Almost surely, 2^252520420 is an apocalyptic number.

252520420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252520420 is an abundant number, since it is smaller than the sum of its proper divisors (294880028).

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

252520420 is a wasteful number, since it uses less digits than its factorization.

252520420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407331 (or 407329 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 252520420 is about 15890.8911015084. The cubic root of 252520420 is about 632.0704702972.

Adding to 252520420 its reverse (24025252), we get a palindrome (276545672).

The spelling of 252520420 in words is "two hundred fifty-two million, five hundred twenty thousand, four hundred twenty".