202124540 has 12 divisors (see below), whose sum is σ = 424461576. Its totient is φ = 80849808.

The previous prime is 202124513. The next prime is 202124551. The reversal of 202124540 is 45421202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10106227 = 202124540 / (2 + 0 + 2 + 1 + 2 + 4 + 5 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

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, 5053094 + ... + 5053133.

It is an arithmetic number, because the mean of its divisors is an integer number (35371798).

Almost surely, 2^202124540 is an apocalyptic number.

202124540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202124540 is an abundant number, since it is smaller than the sum of its proper divisors (222337036).

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

202124540 is a wasteful number, since it uses less digits than its factorization.

202124540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106236 (or 10106234 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 202124540 is about 14217.0510303649. The cubic root of 202124540 is about 586.8669892406.

Adding to 202124540 its reverse (45421202), we get a palindrome (247545742).

The spelling of 202124540 in words is "two hundred two million, one hundred twenty-four thousand, five hundred forty".