1145251431 has 12 divisors (see below), whose sum is σ = 1664159952. Its totient is φ = 758928096.

The previous prime is 1145251421. The next prime is 1145251439. The reversal of 1145251431 is 1341525411.

1145251431 is a `hidden beast` number, since 1 + 145 + 2 + 514 + 3 + 1 = 666.

It is not a de Polignac number, because 1145251431 - 2²³ = 1136862823 is a prime.

It is a super-2 number, since 2×1145251431² = 2623201680415095522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145251395 and 1145251404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145251439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 379486 + ... + 382491.

It is an arithmetic number, because the mean of its divisors is an integer number (138679996).

Almost surely, 2^1145251431 is an apocalyptic number.

1145251431 is a deficient number, since it is larger than the sum of its proper divisors (518908521).

1145251431 is a wasteful number, since it uses less digits than its factorization.

1145251431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762150 (or 762147 counting only the distinct ones).

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

The square root of 1145251431 is about 33841.5636606821. The cubic root of 1145251431 is about 1046.2455272309.

Adding to 1145251431 its reverse (1341525411), we get a palindrome (2486776842).

The spelling of 1145251431 in words is "one billion, one hundred forty-five million, two hundred fifty-one thousand, four hundred thirty-one".