1216141 has 4 divisors (see below), whose sum is σ = 1228284. Its totient is φ = 1204000.

The previous prime is 1216123. The next prime is 1216147. The reversal of 1216141 is 1416121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 206116 = 1005^2 + 454^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216141 - 2⁵ = 1216109 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216147) 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, 5920 + ... + 6121.

It is an arithmetic number, because the mean of its divisors is an integer number (307071).

2^1216141 is an apocalyptic number.

It is an amenable number.

1216141 is a deficient number, since it is larger than the sum of its proper divisors (12143).

1216141 is a wasteful number, since it uses less digits than its factorization.

1216141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142.

The product of its digits is 48, while the sum is 16.

The square root of 1216141 is about 1102.7878309086. The cubic root of 1216141 is about 106.7401912788.

The spelling of 1216141 in words is "one million, two hundred sixteen thousand, one hundred forty-one".