1220541 has 36 divisors (see below), whose sum is σ = 2084832. Its totient is φ = 632016.

The previous prime is 1220507. The next prime is 1220591. The reversal of 1220541 is 1450221.

It is not a de Polignac number, because 1220541 - 2⁹ = 1220029 is a prime.

It is a Curzon number.

1220541 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220591) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53056 + ... + 53078.

It is an arithmetic number, because the mean of its divisors is an integer number (57912).

2^1220541 is an apocalyptic number.

It is an amenable number.

1220541 is a deficient number, since it is larger than the sum of its proper divisors (864291).

1220541 is a wasteful number, since it uses less digits than its factorization.

1220541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1220541 is about 1104.7809737681. The cubic root of 1220541 is about 106.8687650684.

Adding to 1220541 its reverse (1450221), we get a palindrome (2670762).

It can be divided in two parts, 12205 and 41, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 1220541 in words is "one million, two hundred twenty thousand, five hundred forty-one".