1131320657 has 8 divisors (see below), whose sum is σ = 1139261760. Its totient is φ = 1123407760.

The previous prime is 1131320623. The next prime is 1131320681. The reversal of 1131320657 is 7560231311.

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 1131320657 - 2¹⁶ = 1131255121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131323657) 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, 76898 + ... + 90420.

It is an arithmetic number, because the mean of its divisors is an integer number (142407720).

Almost surely, 2^1131320657 is an apocalyptic number.

It is an amenable number.

1131320657 is a deficient number, since it is larger than the sum of its proper divisors (7941103).

1131320657 is a wasteful number, since it uses less digits than its factorization.

1131320657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14103.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1131320657 is about 33635.1104799732. The cubic root of 1131320657 is about 1041.9860523379.

Adding to 1131320657 its reverse (7560231311), we get a palindrome (8691551968).

The spelling of 1131320657 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, six hundred fifty-seven".