1271215 has 16 divisors (see below), whose sum is σ = 1723680. Its totient is φ = 891520.

The previous prime is 1271213. The next prime is 1271227. The reversal of 1271215 is 5121721.

1271215 is a nontrivial binomial coefficient, being equal to C(1595, 2).

It is not a de Polignac number, because 1271215 - 2¹ = 1271213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1271192 and 1271201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1197 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (107730).

2^1271215 is an apocalyptic number.

1271215 is the 1594-th triangular number.

1271215 is the 532-nd centered nonagonal number.

1271215 is a deficient number, since it is larger than the sum of its proper divisors (452465).

1271215 is a wasteful number, since it uses less digits than its factorization.

1271215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its digits is 140, while the sum is 19.

The square root of 1271215 is about 1127.4817071687. The cubic root of 1271215 is about 108.3277367260.

Adding to 1271215 its reverse (5121721), we get a palindrome (6392936).

It can be divided in two parts, 1 and 271215, that added together give a triangular number (271216 = T₇₃₆).

The spelling of 1271215 in words is "one million, two hundred seventy-one thousand, two hundred fifteen".