1216149 has 16 divisors (see below), whose sum is σ = 1788480. Its totient is φ = 728960.

The previous prime is 1216147. The next prime is 1216151. The reversal of 1216149 is 9416121.

It is an interprime number because it is at equal distance from previous prime (1216147) and next prime (1216151).

It is a cyclic number.

It is not a de Polignac number, because 1216149 - 2¹ = 1216147 is a prime.

It is an Ulam number.

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

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 15 ways as a sum of consecutive naturals, for example, 4387 + ... + 4655.

It is an arithmetic number, because the mean of its divisors is an integer number (111780).

2^1216149 is an apocalyptic number.

It is an amenable number.

1216149 is a deficient number, since it is larger than the sum of its proper divisors (572331).

1216149 is a wasteful number, since it uses less digits than its factorization.

1216149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its digits is 432, while the sum is 24.

The square root of 1216149 is about 1102.7914580736. The cubic root of 1216149 is about 106.7404253305.

It can be divided in two parts, 12 and 16149, that added together give a palindrome (16161).

The spelling of 1216149 in words is "one million, two hundred sixteen thousand, one hundred forty-nine".