512540121 has 8 divisors (see below), whose sum is σ = 688303840. Its totient is φ = 339234912.

The previous prime is 512540111. The next prime is 512540131. The reversal of 512540121 is 121045215.

It is an interprime number because it is at equal distance from previous prime (512540111) and next prime (512540131).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 512540121 - 2⁹ = 512539609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512540111) 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, 614140 + ... + 614973.

It is an arithmetic number, because the mean of its divisors is an integer number (86037980).

Almost surely, 2^512540121 is an apocalyptic number.

It is an amenable number.

512540121 is a deficient number, since it is larger than the sum of its proper divisors (175763719).

512540121 is a wasteful number, since it uses less digits than its factorization.

512540121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229255.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 512540121 is about 22639.3489526532. The cubic root of 512540121 is about 800.2812141575.

Adding to 512540121 its reverse (121045215), we get a palindrome (633585336).

The spelling of 512540121 in words is "five hundred twelve million, five hundred forty thousand, one hundred twenty-one".