1216507 has 2 divisors, whose sum is σ = 1216508. Its totient is φ = 1216506.

The previous prime is 1216489. The next prime is 1216529. The reversal of 1216507 is 7056121.

It is an a-pointer prime, because the next prime (1216529) can be obtained adding 1216507 to its sum of digits (22).

It is a weak prime.

It is an emirp because it is prime and its reverse (7056121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216507 - 2⁷ = 1216379 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (1216547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608253 + 608254.

It is an arithmetic number, because the mean of its divisors is an integer number (608254).

2^1216507 is an apocalyptic number.

1216507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216507 is an equidigital number, since it uses as much as digits as its factorization.

1216507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1216507 is about 1102.9537614968. The cubic root of 1216507 is about 106.7508980942.

The spelling of 1216507 in words is "one million, two hundred sixteen thousand, five hundred seven".