1216501 has 16 divisors (see below), whose sum is σ = 1467648. Its totient is φ = 993600.

The previous prime is 1216489. The next prime is 1216507. The reversal of 1216501 is 1056121.

1216501 = T₁₃ + T₁₄ + ... + T₁₉₃.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1216501 - 2⁷ = 1216373 is a prime.

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 (1216507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6631 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (91728).

2^1216501 is an apocalyptic number.

1216501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1216501 is a deficient number, since it is larger than the sum of its proper divisors (251147).

1216501 is a wasteful number, since it uses less digits than its factorization.

1216501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1216501 is about 1102.9510415245. The cubic root of 1216501 is about 106.7507225900.

The spelling of 1216501 in words is "one million, two hundred sixteen thousand, five hundred one".