515340121 has 4 divisors (see below), whose sum is σ = 533110500. Its totient is φ = 497569744.

The previous prime is 515340103. The next prime is 515340131. The reversal of 515340121 is 121043515.

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 107744400 + 407595721 = 10380^2 + 20189^2 .

It is a cyclic number.

It is not a de Polignac number, because 515340121 - 2¹¹ = 515338073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 515340092 and 515340101.

It is not an unprimeable number, because it can be changed into a prime (515340131) 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, 8885146 + ... + 8885203.

It is an arithmetic number, because the mean of its divisors is an integer number (133277625).

Almost surely, 2^515340121 is an apocalyptic number.

It is an amenable number.

515340121 is a deficient number, since it is larger than the sum of its proper divisors (17770379).

515340121 is a wasteful number, since it uses less digits than its factorization.

515340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17770378.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 515340121 is about 22701.1039599399. The cubic root of 515340121 is about 801.7358770435.

Adding to 515340121 its reverse (121043515), we get a palindrome (636383636).

The spelling of 515340121 in words is "five hundred fifteen million, three hundred forty thousand, one hundred twenty-one".