502143921 has 16 divisors (see below), whose sum is σ = 767915520. Its totient is φ = 323963280.

The previous prime is 502143907. The next prime is 502143923. The reversal of 502143921 is 129341205.

It is not a de Polignac number, because 502143921 - 2¹⁴ = 502127537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (502143923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299130 + ... + 300803.

It is an arithmetic number, because the mean of its divisors is an integer number (47994720).

Almost surely, 2^502143921 is an apocalyptic number.

It is an amenable number.

502143921 is a deficient number, since it is larger than the sum of its proper divisors (265771599).

502143921 is a wasteful number, since it uses less digits than its factorization.

502143921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599973 (or 599967 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 502143921 is about 22408.5680265384. The cubic root of 502143921 is about 794.8333292467.

The spelling of 502143921 in words is "five hundred two million, one hundred forty-three thousand, nine hundred twenty-one".