1181506490 has 16 divisors (see below), whose sum is σ = 2127147048. Its totient is φ = 472505856.

The previous prime is 1181506489. The next prime is 1181506517. The reversal of 1181506490 is 946051811.

It can be written as a sum of positive squares in 4 ways, for example, as 524455801 + 657050689 = 22901^2 + 25633^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1181506490.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59234 + ... + 76626.

Almost surely, 2^1181506490 is an apocalyptic number.

1181506490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1181506490 is a deficient number, since it is larger than the sum of its proper divisors (945640558).

1181506490 is a wasteful number, since it uses less digits than its factorization.

1181506490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24193.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 1181506490 is about 34373.0488900825. The cubic root of 1181506490 is about 1057.1713148188.

The spelling of 1181506490 in words is "one billion, one hundred eighty-one million, five hundred six thousand, four hundred ninety".