1215145 has 8 divisors (see below), whose sum is σ = 1535040. Its totient is φ = 920880.

The previous prime is 1215133. The next prime is 1215157. The reversal of 1215145 is 5415121.

It is an interprime number because it is at equal distance from previous prime (1215133) and next prime (1215157).

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

It is not a de Polignac number, because 1215145 - 2⁷ = 1215017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6301 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (191880).

2^1215145 is an apocalyptic number.

It is an amenable number.

1215145 is a deficient number, since it is larger than the sum of its proper divisors (319895).

1215145 is a wasteful number, since it uses less digits than its factorization.

1215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815.

The product of its digits is 200, while the sum is 19.

The square root of 1215145 is about 1102.3361556259. The cubic root of 1215145 is about 106.7110438179.

The spelling of 1215145 in words is "one million, two hundred fifteen thousand, one hundred forty-five".