1118421 has 16 divisors (see below), whose sum is σ = 1729920. Its totient is φ = 712800.

The previous prime is 1118419. The next prime is 1118437. The reversal of 1118421 is 1248111.

It is not a de Polignac number, because 1118421 - 2¹ = 1118419 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1118394 and 1118403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (108120).

2^1118421 is an apocalyptic number.

It is an amenable number.

1118421 is a deficient number, since it is larger than the sum of its proper divisors (611499).

1118421 is a wasteful number, since it uses less digits than its factorization.

1118421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1827 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 1118421 is about 1057.5542539274. The cubic root of 1118421 is about 103.8010558214.

The spelling of 1118421 in words is "one million, one hundred eighteen thousand, four hundred twenty-one".