1161215 has 16 divisors (see below), whose sum is σ = 1558656. Its totient is φ = 823200.

The previous prime is 1161203. The next prime is 1161217. The reversal of 1161215 is 5121611.

It is a de Polignac number, because none of the positive numbers 2^k-1161215 is a prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1161193 and 1161202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2120 + ... + 2610.

It is an arithmetic number, because the mean of its divisors is an integer number (97416).

2^1161215 is an apocalyptic number.

1161215 is a deficient number, since it is larger than the sum of its proper divisors (397441).

1161215 is a wasteful number, since it uses less digits than its factorization.

1161215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its digits is 60, while the sum is 17.

The square root of 1161215 is about 1077.5968633956. The cubic root of 1161215 is about 105.1084291853.

Adding to 1161215 its reverse (5121611), we get a palindrome (6282826).

It can be divided in two parts, 116 and 1215, that added together give a palindrome (1331).

The spelling of 1161215 in words is "one million, one hundred sixty-one thousand, two hundred fifteen".