1218965 has 16 divisors (see below), whose sum is σ = 1641600. Its totient is φ = 861120.

The previous prime is 1218953. The next prime is 1218989. The reversal of 1218965 is 5698121.

It is not a de Polignac number, because 1218965 - 2⁴ = 1218949 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1736 + ... + 2334.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2^1218965 is an apocalyptic number.

It is an amenable number.

1218965 is a deficient number, since it is larger than the sum of its proper divisors (422635).

1218965 is a wasteful number, since it uses less digits than its factorization.

1218965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 4320, while the sum is 32.

The square root of 1218965 is about 1104.0674798218. The cubic root of 1218965 is about 106.8227478466.

The spelling of 1218965 in words is "one million, two hundred eighteen thousand, nine hundred sixty-five".