1215003 has 4 divisors (see below), whose sum is σ = 1620008. Its totient is φ = 810000.

The previous prime is 1214981. The next prime is 1215017. The reversal of 1215003 is 3005121.

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

It is not a de Polignac number, because 1215003 - 2⁵ = 1214971 is a prime.

It is a D-number.

It is a Duffinian number.

1215003 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1215003.

It is not an unprimeable number, because it can be changed into a prime (1215083) 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, 202498 + ... + 202503.

It is an arithmetic number, because the mean of its divisors is an integer number (405002).

2^1215003 is an apocalyptic number.

1215003 is a deficient number, since it is larger than the sum of its proper divisors (405005).

1215003 is an equidigital number, since it uses as much as digits as its factorization.

1215003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405004.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 1215003 is about 1102.2717450792. The cubic root of 1215003 is about 106.7068869592.

The spelling of 1215003 in words is "one million, two hundred fifteen thousand, three".