421366 has 16 divisors (see below), whose sum is σ = 699840. Its totient is φ = 188680.

The previous prime is 421361. The next prime is 421381. The reversal of 421366 is 663124.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2265 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2⁴²¹³⁶⁶ is an apocalyptic number.

421366 is a deficient number, since it is larger than the sum of its proper divisors (278474).

421366 is a wasteful number, since it uses less digits than its factorization.

421366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299.

The product of its digits is 864, while the sum is 22.

The square root of 421366 is about 649.1271061972. The cubic root of 421366 is about 74.9698248982.

It can be divided in two parts, 421 and 366, that added together give a palindrome (787).

The spelling of 421366 in words is "four hundred twenty-one thousand, three hundred sixty-six".