1215071 has 16 divisors (see below), whose sum is σ = 1481760. Its totient is φ = 981120.

The previous prime is 1215047. The next prime is 1215079. The reversal of 1215071 is 1705121.

It is a cyclic number.

It is not a de Polignac number, because 1215071 - 2¹⁰ = 1214047 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 (1215079) 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 15 ways as a sum of consecutive naturals, for example, 4001 + ... + 4293.

It is an arithmetic number, because the mean of its divisors is an integer number (92610).

2^1215071 is an apocalyptic number.

1215071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1215071 is a deficient number, since it is larger than the sum of its proper divisors (266689).

1215071 is a wasteful number, since it uses less digits than its factorization.

1215071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1215071 is about 1102.3025900360. The cubic root of 1215071 is about 106.7088776080.

It can be divided in two parts, 12150 and 71, that added together give a palindrome (12221).

The spelling of 1215071 in words is "one million, two hundred fifteen thousand, seventy-one".