1215995 has 8 divisors (see below), whose sum is σ = 1591920. Its totient is φ = 884320.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1215995 is 5995121.

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

It is not a de Polignac number, because 1215995 - 2¹⁰ = 1214971 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11000 + ... + 11109.

It is an arithmetic number, because the mean of its divisors is an integer number (198990).

2^1215995 is an apocalyptic number.

1215995 is a deficient number, since it is larger than the sum of its proper divisors (375925).

1215995 is a wasteful number, since it uses less digits than its factorization.

1215995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22125.

The product of its digits is 4050, while the sum is 32.

The square root of 1215995 is about 1102.7216330516. The cubic root of 1215995 is about 106.7359196547.

It can be divided in two parts, 121 and 5995, that added together give a palindrome (6116).

The spelling of 1215995 in words is "one million, two hundred fifteen thousand, nine hundred ninety-five".