1216151 has 2 divisors, whose sum is σ = 1216152. Its totient is φ = 1216150.

The previous prime is 1216147. The next prime is 1216177. The reversal of 1216151 is 1516121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216151 - 2² = 1216147 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608075 + 608076.

It is an arithmetic number, because the mean of its divisors is an integer number (608076).

2^1216151 is an apocalyptic number.

1216151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216151 is an equidigital number, since it uses as much as digits as its factorization.

1216151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 1216151 is about 1102.7923648629. The cubic root of 1216151 is about 106.7404838433.

The spelling of 1216151 in words is "one million, two hundred sixteen thousand, one hundred fifty-one".