1143412605 has 60 divisors (see below), whose sum is σ = 2177557140. Its totient is φ = 573889536.

The previous prime is 1143412601. The next prime is 1143412643. The reversal of 1143412605 is 5062143411.

It is a happy number.

1143412605 is a `hidden beast` number, since 1 + 1 + 43 + 4 + 12 + 605 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 23707161 + 1119705444 = 4869^2 + 33462^2 .

It is not a de Polignac number, because 1143412605 - 2² = 1143412601 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143412601) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 112161 + ... + 121929.

It is an arithmetic number, because the mean of its divisors is an integer number (36292619).

Almost surely, 2^1143412605 is an apocalyptic number.

1143412605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143412605 is a deficient number, since it is larger than the sum of its proper divisors (1034144535).

1143412605 is an equidigital number, since it uses as much as digits as its factorization.

1143412605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9820 (or 9794 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1143412605 is about 33814.3845870363. The cubic root of 1143412605 is about 1045.6852735309.

The spelling of 1143412605 in words is "one billion, one hundred forty-three million, four hundred twelve thousand, six hundred five".