1220343045 has 16 divisors (see below), whose sum is σ = 2067405120. Its totient is φ = 612564224.

The previous prime is 1220343013. The next prime is 1220343049. The reversal of 1220343045 is 5403430221.

It is a cyclic number.

It is not a de Polignac number, because 1220343045 - 2⁵ = 1220343013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220343049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2392575 + ... + 2393084.

It is an arithmetic number, because the mean of its divisors is an integer number (129212820).

Almost surely, 2^1220343045 is an apocalyptic number.

1220343045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220343045 is a deficient number, since it is larger than the sum of its proper divisors (847062075).

1220343045 is a wasteful number, since it uses less digits than its factorization.

1220343045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785684.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1220343045 is about 34933.4087228830. The cubic root of 1220343045 is about 1068.6298720697.

Adding to 1220343045 its reverse (5403430221), we get a palindrome (6623773266).

The spelling of 1220343045 in words is "one billion, two hundred twenty million, three hundred forty-three thousand, forty-five".