1191195490 has 16 divisors (see below), whose sum is σ = 2147561280. Its totient is φ = 475720560.

The previous prime is 1191195487. The next prime is 1191195497. The reversal of 1191195490 is 945911911.

It is not an unprimeable number, because it can be changed into a prime (1191195497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88080 + ... + 100699.

It is an arithmetic number, because the mean of its divisors is an integer number (134222580).

Almost surely, 2^1191195490 is an apocalyptic number.

1191195490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1191195490 is a deficient number, since it is larger than the sum of its proper divisors (956365790).

1191195490 is a wasteful number, since it uses less digits than its factorization.

1191195490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189417.

The product of its (nonzero) digits is 14580, while the sum is 40.

The square root of 1191195490 is about 34513.7000334650. The cubic root of 1191195490 is about 1060.0532458123.

It can be divided in two parts, 119119 and 5490, that added together give a square (124609 = 353²).

The spelling of 1191195490 in words is "one billion, one hundred ninety-one million, one hundred ninety-five thousand, four hundred ninety".