813542 has 16 divisors (see below), whose sum is σ = 1305600. Its totient is φ = 379080.

The previous prime is 813541. The next prime is 813559. The reversal of 813542 is 245318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2867 + ... + 3137.

It is an arithmetic number, because the mean of its divisors is an integer number (81600).

2⁸¹³⁵⁴² is an apocalyptic number.

813542 is a deficient number, since it is larger than the sum of its proper divisors (492058).

813542 is a wasteful number, since it uses less digits than its factorization.

813542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371.

The product of its digits is 960, while the sum is 23.

The square root of 813542 is about 901.9656312743. The cubic root of 813542 is about 93.3526518968.

The spelling of 813542 in words is "eight hundred thirteen thousand, five hundred forty-two".