1220525441 has 4 divisors (see below), whose sum is σ = 1234239300. Its totient is φ = 1206811584.

The previous prime is 1220525437. The next prime is 1220525443. The reversal of 1220525441 is 1445250221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65545216 + 1154980225 = 8096^2 + 33985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220525441 - 2² = 1220525437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220525441.

It is not an unprimeable number, because it can be changed into a prime (1220525443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6856796 + ... + 6856973.

It is an arithmetic number, because the mean of its divisors is an integer number (308559825).

Almost surely, 2^1220525441 is an apocalyptic number.

It is an amenable number.

1220525441 is a deficient number, since it is larger than the sum of its proper divisors (13713859).

1220525441 is an equidigital number, since it uses as much as digits as its factorization.

1220525441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13713858.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1220525441 is about 34936.0192494795. The cubic root of 1220525441 is about 1068.6831095876.

Adding to 1220525441 its reverse (1445250221), we get a palindrome (2665775662).

The spelling of 1220525441 in words is "one billion, two hundred twenty million, five hundred twenty-five thousand, four hundred forty-one".