1541222120 has 32 divisors (see below), whose sum is σ = 3541536000. Its totient is φ = 603371328.

The previous prime is 1541222117. The next prime is 1541222129. The reversal of 1541222120 is 212221451.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1541222092 and 1541222101.

It is not an unprimeable number, because it can be changed into a prime (1541222129) 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 7 ways as a sum of consecutive naturals, for example, 408020 + ... + 411779.

It is an arithmetic number, because the mean of its divisors is an integer number (110673000).

Almost surely, 2^1541222120 is an apocalyptic number.

1541222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1541222120 is an abundant number, since it is smaller than the sum of its proper divisors (2000313880).

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

1541222120 is a wasteful number, since it uses less digits than its factorization.

1541222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819857 (or 819853 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1541222120 is about 39258.4019032869. The cubic root of 1541222120 is about 1155.1057467069.

Adding to 1541222120 its reverse (212221451), we get a palindrome (1753443571).

The spelling of 1541222120 in words is "one billion, five hundred forty-one million, two hundred twenty-two thousand, one hundred twenty".