1181227140 has 36 divisors (see below), whose sum is σ = 3583056204. Its totient is φ = 314993856.

The previous prime is 1181227111. The next prime is 1181227153. The reversal of 1181227140 is 417221811.

It can be written as a sum of positive squares in 2 ways, for example, as 615833856 + 565393284 = 24816^2 + 23778^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3281007 + ... + 3281366.

It is an arithmetic number, because the mean of its divisors is an integer number (99529339).

Almost surely, 2^1181227140 is an apocalyptic number.

1181227140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181227140 is an abundant number, since it is smaller than the sum of its proper divisors (2401829064).

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

1181227140 is a wasteful number, since it uses less digits than its factorization.

1181227140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562388 (or 6562383 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1181227140 is about 34368.9851464951. The cubic root of 1181227140 is about 1057.0879906653.

Adding to 1181227140 its reverse (417221811), we get a palindrome (1598448951).

The spelling of 1181227140 in words is "one billion, one hundred eighty-one million, two hundred twenty-seven thousand, one hundred forty".