1672218 has 32 divisors (see below), whose sum is σ = 3758400. Its totient is φ = 551088.

The previous prime is 1672199. The next prime is 1672219. The reversal of 1672218 is 8122761.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1672191 and 1672200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672219) 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, 9253 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (117450).

2^1672218 is an apocalyptic number.

1672218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1672218 is an abundant number, since it is smaller than the sum of its proper divisors (2086182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1672218 is a wasteful number, since it uses less digits than its factorization.

1672218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 357 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1672218 is about 1293.1426835427. The cubic root of 1672218 is about 118.6946009368.

Adding to 1672218 its reverse (8122761), we get a palindrome (9794979).

The spelling of 1672218 in words is "one million, six hundred seventy-two thousand, two hundred eighteen".