213842 has 4 divisors (see below), whose sum is σ = 320766. Its totient is φ = 106920.

The previous prime is 213833. The next prime is 213847. The reversal of 213842 is 248312.

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

It can be written as a sum of positive squares in only one way, i.e., 130321 + 83521 = 361^2 + 289^2 .

It is not an unprimeable number, because it can be changed into a prime (213847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53459 + ... + 53462.

2²¹³⁸⁴² is an apocalyptic number.

213842 is a deficient number, since it is larger than the sum of its proper divisors (106924).

213842 is a wasteful number, since it uses less digits than its factorization.

213842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106923.

The product of its digits is 384, while the sum is 20.

The square root of 213842 is about 462.4305353240. The cubic root of 213842 is about 59.7995160343.

The spelling of 213842 in words is "two hundred thirteen thousand, eight hundred forty-two".