1171872490 has 8 divisors (see below), whose sum is σ = 2109370500. Its totient is φ = 468748992.

The previous prime is 1171872487. The next prime is 1171872497. The reversal of 1171872490 is 942781711.

It can be written as a sum of positive squares in 2 ways, for example, as 1084319041 + 87553449 = 32929^2 + 9357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1171872497) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58593615 + ... + 58593634.

Almost surely, 2^1171872490 is an apocalyptic number.

1171872490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1171872490 is a deficient number, since it is larger than the sum of its proper divisors (937498010).

1171872490 is a wasteful number, since it uses less digits than its factorization.

1171872490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117187256.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1171872490 is about 34232.6231831567. The cubic root of 1171872490 is about 1054.2900789099.

The spelling of 1171872490 in words is "one billion, one hundred seventy-one million, eight hundred seventy-two thousand, four hundred ninety".