1211642 has 8 divisors (see below), whose sum is σ = 1822176. Its totient is φ = 604252.

The previous prime is 1211629. The next prime is 1211647. The reversal of 1211642 is 2461121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1211642.

It is not an unprimeable number, because it can be changed into a prime (1211647) 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 3 ways as a sum of consecutive naturals, for example, 923 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (227772).

2^1211642 is an apocalyptic number.

1211642 is a deficient number, since it is larger than the sum of its proper divisors (610534).

1211642 is an equidigital number, since it uses as much as digits as its factorization.

1211642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 96, while the sum is 17.

The square root of 1211642 is about 1100.7461105995. The cubic root of 1211642 is about 106.6084035113.

Adding to 1211642 its reverse (2461121), we get a palindrome (3672763).

The spelling of 1211642 in words is "one million, two hundred eleven thousand, six hundred forty-two".