515242142 has 16 divisors (see below), whose sum is σ = 780299520. Its totient is φ = 255151512.

The previous prime is 515242141. The next prime is 515242151. The reversal of 515242142 is 241242515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515242141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126713 + ... + 130715.

It is an arithmetic number, because the mean of its divisors is an integer number (48768720).

Almost surely, 2^515242142 is an apocalyptic number.

515242142 is a deficient number, since it is larger than the sum of its proper divisors (265057378).

515242142 is a wasteful number, since it uses less digits than its factorization.

515242142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607.

The product of its digits is 3200, while the sum is 26.

The square root of 515242142 is about 22698.9458345536. The cubic root of 515242142 is about 801.6850638329.

Adding to 515242142 its reverse (241242515), we get a palindrome (756484657).

The spelling of 515242142 in words is "five hundred fifteen million, two hundred forty-two thousand, one hundred forty-two".