1220408043 has 4 divisors (see below), whose sum is σ = 1627210728. Its totient is φ = 813605360.

The previous prime is 1220408027. The next prime is 1220408047. The reversal of 1220408043 is 3408040221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3408040221 = 3 ⋅1136013407.

It is a cyclic number.

It is not a de Polignac number, because 1220408043 - 2⁴ = 1220408027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220408047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203401338 + ... + 203401343.

It is an arithmetic number, because the mean of its divisors is an integer number (406802682).

Almost surely, 2^1220408043 is an apocalyptic number.

1220408043 is a deficient number, since it is larger than the sum of its proper divisors (406802685).

1220408043 is an equidigital number, since it uses as much as digits as its factorization.

1220408043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406802684.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1220408043 is about 34934.3390233735. The cubic root of 1220408043 is about 1068.6488442135.

Adding to 1220408043 its reverse (3408040221), we get a palindrome (4628448264).

The spelling of 1220408043 in words is "one billion, two hundred twenty million, four hundred eight thousand, forty-three".