1220124660 has 96 divisors (see below), whose sum is σ = 3593382912. Its totient is φ = 308904960.

The previous prime is 1220124643. The next prime is 1220124671. The reversal of 1220124660 is 664210221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220124660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92392 + ... + 104768.

It is an arithmetic number, because the mean of its divisors is an integer number (37431072).

Almost surely, 2^1220124660 is an apocalyptic number.

1220124660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220124660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1796691456).

1220124660 is an abundant number, since it is smaller than the sum of its proper divisors (2373258252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220124660 is a wasteful number, since it uses less digits than its factorization.

1220124660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12473 (or 12471 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1220124660 is about 34930.2828502719. The cubic root of 1220124660 is about 1068.5661231487.

Adding to 1220124660 its reverse (664210221), we get a palindrome (1884334881).

The spelling of 1220124660 in words is "one billion, two hundred twenty million, one hundred twenty-four thousand, six hundred sixty".