1145143251 has 40 divisors (see below), whose sum is σ = 2040048384. Its totient is φ = 625909680.

The previous prime is 1145143231. The next prime is 1145143253. The reversal of 1145143251 is 1523415411.

1145143251 is a `hidden beast` number, since 114 + 514 + 32 + 5 + 1 = 666.

It is not a de Polignac number, because 1145143251 - 2¹¹ = 1145141203 is a prime.

It is a super-2 number, since 2×1145143251² = 2622706130621698002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1145143253) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30865 + ... + 56946.

Almost surely, 2^1145143251 is an apocalyptic number.

1145143251 is a deficient number, since it is larger than the sum of its proper divisors (894905133).

1145143251 is an equidigital number, since it uses as much as digits as its factorization.

1145143251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87853 (or 87844 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1145143251 is about 33839.9652925354. The cubic root of 1145143251 is about 1046.2125835465.

Adding to 1145143251 its reverse (1523415411), we get a palindrome (2668558662).

The spelling of 1145143251 in words is "one billion, one hundred forty-five million, one hundred forty-three thousand, two hundred fifty-one".