1216671 has 16 divisors (see below), whose sum is σ = 1698144. Its totient is φ = 774144.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216671 is 1766121.

It is not a de Polignac number, because 1216671 - 2⁷ = 1216543 is a prime.

1216671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10711 + ... + 10823.

It is an arithmetic number, because the mean of its divisors is an integer number (106134).

2^1216671 is an apocalyptic number.

1216671 is a deficient number, since it is larger than the sum of its proper divisors (481473).

1216671 is a wasteful number, since it uses less digits than its factorization.

1216671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250.

The product of its digits is 504, while the sum is 24.

The square root of 1216671 is about 1103.0281048097. The cubic root of 1216671 is about 106.7556949869.

The spelling of 1216671 in words is "one million, two hundred sixteen thousand, six hundred seventy-one".