1211875 has 20 divisors (see below), whose sum is σ = 1736944. Its totient is φ = 828000.

The previous prime is 1211863. The next prime is 1211897. The reversal of 1211875 is 5781121.

It is not a de Polignac number, because 1211875 - 2⁵ = 1211843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

1211875 is a lucky number.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 4237 + ... + 4513.

2^1211875 is an apocalyptic number.

1211875 is a deficient number, since it is larger than the sum of its proper divisors (525069).

1211875 is an frugal number, since it uses more digits than its factorization.

1211875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 289 counting only the distinct ones).

The product of its digits is 560, while the sum is 25.

The square root of 1211875 is about 1100.8519428152. The cubic root of 1211875 is about 106.6152367085.

Adding to 1211875 its reverse (5781121), we get a palindrome (6992996).

The spelling of 1211875 in words is "one million, two hundred eleven thousand, eight hundred seventy-five".