1216772 has 6 divisors (see below), whose sum is σ = 2129358. Its totient is φ = 608384.

The previous prime is 1216763. The next prime is 1216777. The reversal of 1216772 is 2776121.

It can be written as a sum of positive squares in only one way, i.e., 952576 + 264196 = 976^2 + 514^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1216777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152093 + ... + 152100.

It is an arithmetic number, because the mean of its divisors is an integer number (354893).

2^1216772 is an apocalyptic number.

It is an amenable number.

1216772 is a deficient number, since it is larger than the sum of its proper divisors (912586).

1216772 is a wasteful number, since it uses less digits than its factorization.

1216772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304197 (or 304195 counting only the distinct ones).

The product of its digits is 1176, while the sum is 26.

The square root of 1216772 is about 1103.0738869178. The cubic root of 1216772 is about 106.7586489564.

The spelling of 1216772 in words is "one million, two hundred sixteen thousand, seven hundred seventy-two".