1215383 has 4 divisors (see below), whose sum is σ = 1308888. Its totient is φ = 1121880.

The previous prime is 1215367. The next prime is 1215391. The reversal of 1215383 is 3835121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3835121 = 877 ⋅4373.

It is a cyclic number.

It is not a de Polignac number, because 1215383 - 2⁴ = 1215367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215083) 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 3 ways as a sum of consecutive naturals, for example, 46733 + ... + 46758.

It is an arithmetic number, because the mean of its divisors is an integer number (327222).

2^1215383 is an apocalyptic number.

1215383 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1215383 is a deficient number, since it is larger than the sum of its proper divisors (93505).

1215383 is an equidigital number, since it uses as much as digits as its factorization.

1215383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93504.

The product of its digits is 720, while the sum is 23.

The square root of 1215383 is about 1102.4441028914. Note that the first 3 decimals coincide. The cubic root of 1215383 is about 106.7180102213.

The spelling of 1215383 in words is "one million, two hundred fifteen thousand, three hundred eighty-three".