1215503 has 4 divisors (see below), whose sum is σ = 1227408. Its totient is φ = 1203600.

The previous prime is 1215499. The next prime is 1215509. The reversal of 1215503 is 3055121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215503 - 2² = 1215499 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 (1215509) 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, 5798 + ... + 6003.

It is an arithmetic number, because the mean of its divisors is an integer number (306852).

2^1215503 is an apocalyptic number.

1215503 is a deficient number, since it is larger than the sum of its proper divisors (11905).

1215503 is a wasteful number, since it uses less digits than its factorization.

1215503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1215503 is about 1102.4985260761. The cubic root of 1215503 is about 106.7215223487.

The spelling of 1215503 in words is "one million, two hundred fifteen thousand, five hundred three".