513542 has 4 divisors (see below), whose sum is σ = 770316. Its totient is φ = 256770.

The previous prime is 513533. The next prime is 513593. The reversal of 513542 is 245315.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128384 + ... + 128387.

It is an arithmetic number, because the mean of its divisors is an integer number (192579).

2⁵¹³⁵⁴² is an apocalyptic number.

513542 is a deficient number, since it is larger than the sum of its proper divisors (256774).

513542 is a wasteful number, since it uses less digits than its factorization.

513542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256773.

The product of its digits is 600, while the sum is 20.

The square root of 513542 is about 716.6184479903. The cubic root of 513542 is about 80.0802320084.

Adding to 513542 its reverse (245315), we get a palindrome (758857).

The spelling of 513542 in words is "five hundred thirteen thousand, five hundred forty-two".