1150561220 has 24 divisors (see below), whose sum is σ = 2417952600. Its totient is φ = 459886592.

The previous prime is 1150561219. The next prime is 1150561231. The reversal of 1150561220 is 221650511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 137921536 + 1012639684 = 11744^2 + 31822^2 .

It is a super-2 number, since 2×1150561220² = 2647582241935776800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7766 + ... + 48594.

It is an arithmetic number, because the mean of its divisors is an integer number (100748025).

Almost surely, 2^1150561220 is an apocalyptic number.

1150561220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1150561220 is an abundant number, since it is smaller than the sum of its proper divisors (1267391380).

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

1150561220 is a wasteful number, since it uses less digits than its factorization.

1150561220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42247 (or 42245 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1150561220 is about 33919.9236437820. The cubic root of 1150561220 is about 1047.8599556957.

The spelling of 1150561220 in words is "one billion, one hundred fifty million, five hundred sixty-one thousand, two hundred twenty".