502155121 has 4 divisors (see below), whose sum is σ = 540782452. Its totient is φ = 463527792.

The previous prime is 502155109. The next prime is 502155131. The reversal of 502155121 is 121551205.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193766400 + 308388721 = 13920^2 + 17561^2 .

It is not a de Polignac number, because 502155121 - 2¹¹ = 502153073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 502155092 and 502155101.

It is not an unprimeable number, because it can be changed into a prime (502155131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19313646 + ... + 19313671.

It is an arithmetic number, because the mean of its divisors is an integer number (135195613).

Almost surely, 2^502155121 is an apocalyptic number.

It is an amenable number.

502155121 is a deficient number, since it is larger than the sum of its proper divisors (38627331).

502155121 is a wasteful number, since it uses less digits than its factorization.

502155121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38627330.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 502155121 is about 22408.8179295562. The cubic root of 502155121 is about 794.8392386196.

The spelling of 502155121 in words is "five hundred two million, one hundred fifty-five thousand, one hundred twenty-one".