1972218 has 16 divisors (see below), whose sum is σ = 3962880. Its totient is φ = 654336.

The previous prime is 1972207. The next prime is 1972231. The reversal of 1972218 is 8122791.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (247680).

2^1972218 is an apocalyptic number.

1972218 is an abundant number, since it is smaller than the sum of its proper divisors (1990662).

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

1972218 is a wasteful number, since it uses less digits than its factorization.

1972218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541.

The product of its digits is 2016, while the sum is 30.

The square root of 1972218 is about 1404.3567922718. The cubic root of 1972218 is about 125.4059972356.

It can be divided in two parts, 197 and 2218, that added together give a triangular number (2415 = T₆₉).

The spelling of 1972218 in words is "one million, nine hundred seventy-two thousand, two hundred eighteen".