1901218 has 16 divisors (see below), whose sum is σ = 3149280. Its totient is φ = 853600.

The previous prime is 1901209. The next prime is 1901219. The reversal of 1901218 is 8121091.

It is a super-2 number, since 2×1901218² = 7229259767048, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1901219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1473 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (196830).

2^1901218 is an apocalyptic number.

1901218 is a deficient number, since it is larger than the sum of its proper divisors (1248062).

1901218 is a wasteful number, since it uses less digits than its factorization.

1901218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1901218 is about 1378.8466194614. The cubic root of 1901218 is about 123.8826934310.

The spelling of 1901218 in words is "one million, nine hundred one thousand, two hundred eighteen".