220874 has 4 divisors (see below), whose sum is σ = 331314. Its totient is φ = 110436.

The previous prime is 220873. The next prime is 220877. The reversal of 220874 is 478022.

Added to its reverse (478022) it gives a square (698896 = 836²).

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., 165649 + 55225 = 407^2 + 235^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (220873) 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 as a sum of consecutive naturals, namely, 55217 + ... + 55220.

2²²⁰⁸⁷⁴ is an apocalyptic number.

220874 is a deficient number, since it is larger than the sum of its proper divisors (110440).

220874 is a wasteful number, since it uses less digits than its factorization.

220874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110439.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 220874 is about 469.9723396116. The cubic root of 220874 is about 60.4479437473.

Adding to 220874 its reverse (478022), we get a palindrome (698896).

The spelling of 220874 in words is "two hundred twenty thousand, eight hundred seventy-four".