1091241431 has 8 divisors (see below), whose sum is σ = 1259241984. Its totient is φ = 926268120.

The previous prime is 1091241427. The next prime is 1091241439. The reversal of 1091241431 is 1341421901.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1091241431 - 2² = 1091241427 is a prime.

It is a super-2 number, since 2×1091241431² = 2381615721461855522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1091241431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091241439) by changing a digit.

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, 756035 + ... + 757476.

It is an arithmetic number, because the mean of its divisors is an integer number (157405248).

Almost surely, 2^1091241431 is an apocalyptic number.

1091241431 is a deficient number, since it is larger than the sum of its proper divisors (168000553).

1091241431 is a wasteful number, since it uses less digits than its factorization.

1091241431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513621.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1091241431 is about 33033.9436186478. The cubic root of 1091241431 is about 1029.5330245633.

The spelling of 1091241431 in words is "one billion, ninety-one million, two hundred forty-one thousand, four hundred thirty-one".