1230541220 has 12 divisors (see below), whose sum is σ = 2584136604. Its totient is φ = 492216480.

The previous prime is 1230541219. The next prime is 1230541223. The reversal of 1230541220 is 221450321.

It can be written as a sum of positive squares in 2 ways, for example, as 925619776 + 304921444 = 30424^2 + 17462^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 61527061 = 1230541220 / (1 + 2 + 3 + 0 + 5 + 4 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1230541192 and 1230541201.

It is not an unprimeable number, because it can be changed into a prime (1230541223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30763511 + ... + 30763550.

It is an arithmetic number, because the mean of its divisors is an integer number (215344717).

Almost surely, 2^1230541220 is an apocalyptic number.

1230541220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230541220 is an abundant number, since it is smaller than the sum of its proper divisors (1353595384).

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

1230541220 is a wasteful number, since it uses less digits than its factorization.

1230541220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61527070 (or 61527068 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1230541220 is about 35079.0709683139. The cubic root of 1230541220 is about 1071.5983971736.

Adding to 1230541220 its reverse (221450321), we get a palindrome (1451991541).

The spelling of 1230541220 in words is "one billion, two hundred thirty million, five hundred forty-one thousand, two hundred twenty".