1291153026 has 16 divisors (see below), whose sum is σ = 2734206624. Its totient is φ = 405067584.

The previous prime is 1291153021. The next prime is 1291153079. The reversal of 1291153026 is 6203511921.

1291153026 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1291153026² = 3334152273097913352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1291152984 and 1291153002.

It is not an unprimeable number, because it can be changed into a prime (1291153021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6329080 + ... + 6329283.

It is an arithmetic number, because the mean of its divisors is an integer number (170887914).

Almost surely, 2^1291153026 is an apocalyptic number.

1291153026 is an abundant number, since it is smaller than the sum of its proper divisors (1443053598).

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

1291153026 is a wasteful number, since it uses less digits than its factorization.

1291153026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12658385.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1291153026 is about 35932.6178562041. The cubic root of 1291153026 is about 1088.9114700432.

Adding to 1291153026 its reverse (6203511921), we get a palindrome (7494664947).

The spelling of 1291153026 in words is "one billion, two hundred ninety-one million, one hundred fifty-three thousand, twenty-six".