1211541 has 8 divisors (see below), whose sum is σ = 1620864. Its totient is φ = 804960.

The previous prime is 1211537. The next prime is 1211543. The reversal of 1211541 is 1451121.

It is a happy number.

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

It is not a de Polignac number, because 1211541 - 2² = 1211537 is a prime.

1211541 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (202608).

2^1211541 is an apocalyptic number.

It is an amenable number.

1211541 is a deficient number, since it is larger than the sum of its proper divisors (409323).

1211541 is an equidigital number, since it uses as much as digits as its factorization.

1211541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371.

The product of its digits is 40, while the sum is 15.

The square root of 1211541 is about 1100.7002316707. The cubic root of 1211541 is about 106.6054412095.

Adding to 1211541 its reverse (1451121), we get a palindrome (2662662).

The spelling of 1211541 in words is "one million, two hundred eleven thousand, five hundred forty-one".