515642 has 8 divisors (see below), whose sum is σ = 776736. Its totient is φ = 256732.

The previous prime is 515639. The next prime is 515651. The reversal of 515642 is 246515.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (97092).

2⁵¹⁵⁶⁴² is an apocalyptic number.

515642 is a deficient number, since it is larger than the sum of its proper divisors (261094).

515642 is a wasteful number, since it uses less digits than its factorization.

515642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its digits is 1200, while the sum is 23.

The square root of 515642 is about 718.0821680003. The cubic root of 515642 is about 80.1892395022.

It can be divided in two parts, 5 and 15642, that multiplied together give a triangular number (78210 = T₃₉₅).

The spelling of 515642 in words is "five hundred fifteen thousand, six hundred forty-two".