1140191591 has 24 divisors (see below), whose sum is σ = 1467285792. Its totient is φ = 866764800.

The previous prime is 1140191573. The next prime is 1140191603. The reversal of 1140191591 is 1951910411.

It is a happy number.

It is not a de Polignac number, because 1140191591 - 2¹⁰ = 1140190567 is a prime.

It is a super-2 number, since 2×1140191591² = 2600073728374222562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140191561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18311 + ... + 51143.

It is an arithmetic number, because the mean of its divisors is an integer number (61136908).

Almost surely, 2^1140191591 is an apocalyptic number.

1140191591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1140191591 is a deficient number, since it is larger than the sum of its proper divisors (327094201).

1140191591 is a wasteful number, since it uses less digits than its factorization.

1140191591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32903 (or 32892 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 32.

The square root of 1140191591 is about 33766.7231309169. The cubic root of 1140191591 is about 1044.7024452911.

The spelling of 1140191591 in words is "one billion, one hundred forty million, one hundred ninety-one thousand, five hundred ninety-one".