1216870 has 8 divisors (see below), whose sum is σ = 2190384. Its totient is φ = 486744.

The previous prime is 1216867. The next prime is 1216871. The reversal of 1216870 is 786121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216871) 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, 60834 + ... + 60853.

It is an arithmetic number, because the mean of its divisors is an integer number (273798).

2^1216870 is an apocalyptic number.

1216870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216870 is a deficient number, since it is larger than the sum of its proper divisors (973514).

1216870 is a wasteful number, since it uses less digits than its factorization.

1216870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121694.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1216870 is about 1103.1183073451. The cubic root of 1216870 is about 106.7615150279.

The spelling of 1216870 in words is "one million, two hundred sixteen thousand, eight hundred seventy".