1181145090 has 16 divisors (see below), whose sum is σ = 2834748288. Its totient is φ = 314972016.

The previous prime is 1181145083. The next prime is 1181145143. The reversal of 1181145090 is 905411811.

It is a happy number.

It is a super-2 number, since 2×1181145090² = 2790207447262216200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 39371503 = 1181145090 / (1 + 1 + 8 + 1 + 1 + 4 + 5 + 0 + 9 + 0).

It is a Curzon number.

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, 19685722 + ... + 19685781.

It is an arithmetic number, because the mean of its divisors is an integer number (177171768).

Almost surely, 2^1181145090 is an apocalyptic number.

1181145090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1181145090 is an abundant number, since it is smaller than the sum of its proper divisors (1653603198).

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

1181145090 is a wasteful number, since it uses less digits than its factorization.

1181145090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39371513.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1181145090 is about 34367.7914623561. The cubic root of 1181145090 is about 1057.0635144024.

The spelling of 1181145090 in words is "one billion, one hundred eighty-one million, one hundred forty-five thousand, ninety".