1216975 has 6 divisors (see below), whose sum is σ = 1509080. Its totient is φ = 973560.

The previous prime is 1216973. The next prime is 1216987. The reversal of 1216975 is 5796121.

It is not a de Polignac number, because 1216975 - 2¹ = 1216973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216973) 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 in 5 ways as a sum of consecutive naturals, for example, 24315 + ... + 24364.

2^1216975 is an apocalyptic number.

1216975 is a deficient number, since it is larger than the sum of its proper divisors (292105).

1216975 is an equidigital number, since it uses as much as digits as its factorization.

1216975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48689 (or 48684 counting only the distinct ones).

The product of its digits is 3780, while the sum is 31.

The square root of 1216975 is about 1103.1658986753. The cubic root of 1216975 is about 106.7645856480.

The spelling of 1216975 in words is "one million, two hundred sixteen thousand, nine hundred seventy-five".