1218955 has 8 divisors (see below), whose sum is σ = 1474704. Its totient is φ = 967200.

The previous prime is 1218953. The next prime is 1218989. The reversal of 1218955 is 5598121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1218955 - 2¹ = 1218953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218953) 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, 276 + ... + 1585.

It is an arithmetic number, because the mean of its divisors is an integer number (184338).

2^1218955 is an apocalyptic number.

1218955 is a deficient number, since it is larger than the sum of its proper divisors (255749).

1218955 is a wasteful number, since it uses less digits than its factorization.

1218955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997.

The product of its digits is 3600, while the sum is 31.

The square root of 1218955 is about 1104.0629511038. The cubic root of 1218955 is about 106.8224557325.

The spelling of 1218955 in words is "one million, two hundred eighteen thousand, nine hundred fifty-five".