1149991442 has 16 divisors (see below), whose sum is σ = 1734228960. Its totient is φ = 571923072.

The previous prime is 1149991439. The next prime is 1149991457. The reversal of 1149991442 is 2441999411.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1149991393 and 1149991402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379409 + ... + 382427.

It is an arithmetic number, because the mean of its divisors is an integer number (108389310).

Almost surely, 2^1149991442 is an apocalyptic number.

1149991442 is a deficient number, since it is larger than the sum of its proper divisors (584237518).

1149991442 is a wasteful number, since it uses less digits than its factorization.

1149991442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977.

The product of its digits is 93312, while the sum is 44.

The square root of 1149991442 is about 33911.5237345655. The cubic root of 1149991442 is about 1047.6869542878.

The spelling of 1149991442 in words is "one billion, one hundred forty-nine million, nine hundred ninety-one thousand, four hundred forty-two".