1220310405 has 48 divisors (see below), whose sum is σ = 2266729920. Its totient is φ = 605136384.

The previous prime is 1220310389. The next prime is 1220310409. The reversal of 1220310405 is 5040130221.

It is not a de Polignac number, because 1220310405 - 2⁴ = 1220310389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220310409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53886 + ... + 73104.

It is an arithmetic number, because the mean of its divisors is an integer number (47223540).

Almost surely, 2^1220310405 is an apocalyptic number.

1220310405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220310405 is a deficient number, since it is larger than the sum of its proper divisors (1046419515).

1220310405 is a wasteful number, since it uses less digits than its factorization.

1220310405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19330 (or 19327 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1220310405 is about 34932.9415451948. The cubic root of 1220310405 is about 1068.6203445875.

Adding to 1220310405 its reverse (5040130221), we get a palindrome (6260440626).

The spelling of 1220310405 in words is "one billion, two hundred twenty million, three hundred ten thousand, four hundred five".