1291339032 has 32 divisors (see below), whose sum is σ = 3229558080. Its totient is φ = 430284960.

The previous prime is 1291338949. The next prime is 1291339037. The reversal of 1291339032 is 2309331921.

It is a super-5 number, since 5×1291339032⁵ (a number of 47 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1291338984 and 1291339002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291339037) 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, 67407 + ... + 84417.

It is an arithmetic number, because the mean of its divisors is an integer number (100923690).

Almost surely, 2^1291339032 is an apocalyptic number.

1291339032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291339032 is an abundant number, since it is smaller than the sum of its proper divisors (1938219048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1291339032 is a wasteful number, since it uses less digits than its factorization.

1291339032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20183 (or 20179 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 1291339032 is about 35935.2060241763. The cubic root of 1291339032 is about 1088.9637577626.

The spelling of 1291339032 in words is "one billion, two hundred ninety-one million, three hundred thirty-nine thousand, thirty-two".