1131144457 has 8 divisors (see below), whose sum is σ = 1137960000. Its totient is φ = 1124340624.

The previous prime is 1131144437. The next prime is 1131144481. The reversal of 1131144457 is 7544411311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131144457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131144407) 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, 257919 + ... + 262267.

It is an arithmetic number, because the mean of its divisors is an integer number (142245000).

Almost surely, 2^1131144457 is an apocalyptic number.

It is an amenable number.

1131144457 is a deficient number, since it is larger than the sum of its proper divisors (6815543).

1131144457 is a wasteful number, since it uses less digits than its factorization.

1131144457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855.

The product of its digits is 6720, while the sum is 31.

The square root of 1131144457 is about 33632.4910912052. The cubic root of 1131144457 is about 1041.9319540668.

Adding to 1131144457 its reverse (7544411311), we get a palindrome (8675555768).

It can be divided in two parts, 113114445 and 7, that multiplied together give a triangular number (791801115 = T₃₉₇₉₄).

The spelling of 1131144457 in words is "one billion, one hundred thirty-one million, one hundred forty-four thousand, four hundred fifty-seven".