1145132531 has 8 divisors (see below), whose sum is σ = 1165462704. Its totient is φ = 1124928000.

The previous prime is 1145132507. The next prime is 1145132537. The reversal of 1145132531 is 1352315411.

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-1145132531 is a prime.

It is a super-2 number, since 2×1145132531² = 2622657027108931922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145132531.

It is not an unprimeable number, because it can be changed into a prime (1145132537) 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, 12926 + ... + 49571.

It is an arithmetic number, because the mean of its divisors is an integer number (145682838).

Almost surely, 2^1145132531 is an apocalyptic number.

1145132531 is a deficient number, since it is larger than the sum of its proper divisors (20330173).

1145132531 is an equidigital number, since it uses as much as digits as its factorization.

1145132531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62821.

The product of its digits is 1800, while the sum is 26.

The square root of 1145132531 is about 33839.8068995673. The cubic root of 1145132531 is about 1046.2093189087.

Adding to 1145132531 its reverse (1352315411), we get a palindrome (2497447942).

The spelling of 1145132531 in words is "one billion, one hundred forty-five million, one hundred thirty-two thousand, five hundred thirty-one".