1151261317 has 4 divisors (see below), whose sum is σ = 1178034880. Its totient is φ = 1124487756.

The previous prime is 1151261269. The next prime is 1151261323. The reversal of 1151261317 is 7131621511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7131621511 = 7 ⋅1018803073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151261317 is a prime.

It is a super-4 number, since 4×1151261317⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151261417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13386717 + ... + 13386802.

It is an arithmetic number, because the mean of its divisors is an integer number (294508720).

Almost surely, 2^1151261317 is an apocalyptic number.

It is an amenable number.

1151261317 is a deficient number, since it is larger than the sum of its proper divisors (26773563).

1151261317 is an equidigital number, since it uses as much as digits as its factorization.

1151261317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26773562.

The product of its digits is 1260, while the sum is 28.

The square root of 1151261317 is about 33930.2419236881. The cubic root of 1151261317 is about 1048.0724476095.

Adding to 1151261317 its reverse (7131621511), we get a palindrome (8282882828).

The spelling of 1151261317 in words is "one billion, one hundred fifty-one million, two hundred sixty-one thousand, three hundred seventeen".