1216011 has 8 divisors (see below), whose sum is σ = 1627024. Its totient is φ = 807840.

The previous prime is 1216009. The next prime is 1216013. The reversal of 1216011 is 1106121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1216009) and next prime (1216013).

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

It is not a de Polignac number, because 1216011 - 2¹ = 1216009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216013) 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, 681 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (203378).

2^1216011 is an apocalyptic number.

1216011 is a deficient number, since it is larger than the sum of its proper divisors (411013).

1216011 is a wasteful number, since it uses less digits than its factorization.

1216011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1216011 is about 1102.7288878052. The cubic root of 1216011 is about 106.7363877946.

The spelling of 1216011 in words is "one million, two hundred sixteen thousand, eleven".