1218772 has 12 divisors (see below), whose sum is σ = 2159136. Its totient is φ = 601880.

The previous prime is 1218761. The next prime is 1218773. The reversal of 1218772 is 2778121.

It is a self number, because there is not a number n which added to its sum of digits gives 1218772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1504 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2^1218772 is an apocalyptic number.

It is an amenable number.

1218772 is a deficient number, since it is larger than the sum of its proper divisors (940364).

1218772 is a wasteful number, since it uses less digits than its factorization.

1218772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758 (or 3756 counting only the distinct ones).

The product of its digits is 1568, while the sum is 28.

The square root of 1218772 is about 1103.9800722839. The cubic root of 1218772 is about 106.8171097633.

The spelling of 1218772 in words is "one million, two hundred eighteen thousand, seven hundred seventy-two".