1211115 has 16 divisors (see below), whose sum is σ = 1951488. Its totient is φ = 641376.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211115 is 5111121.

It is not a de Polignac number, because 1211115 - 2⁵ = 1211083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211115.

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 15 ways as a sum of consecutive naturals, for example, 3792 + ... + 4098.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

2^1211115 is an apocalyptic number.

1211115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1211115 is a deficient number, since it is larger than the sum of its proper divisors (740373).

1211115 is a wasteful number, since it uses less digits than its factorization.

1211115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its digits is 10, while the sum is 12.

The square root of 1211115 is about 1100.5067014789. The cubic root of 1211115 is about 106.5929449363.

Adding to 1211115 its reverse (5111121), we get a palindrome (6322236).

It can be divided in two parts, 1211 and 115, that added together give a triangular number (1326 = T₅₁).

The spelling of 1211115 in words is "one million, two hundred eleven thousand, one hundred fifteen".