1143154157 has 2 divisors, whose sum is σ = 1143154158. Its totient is φ = 1143154156.

The previous prime is 1143154127. The next prime is 1143154193. The reversal of 1143154157 is 7514513411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690060361 + 453093796 = 26269^2 + 21286^2 .

It is an emirp because it is prime and its reverse (7514513411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1143154157 - 2¹⁴ = 1143137773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143154127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571577078 + 571577079.

It is an arithmetic number, because the mean of its divisors is an integer number (571577079).

Almost surely, 2^1143154157 is an apocalyptic number.

It is an amenable number.

1143154157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143154157 is an equidigital number, since it uses as much as digits as its factorization.

1143154157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 32.

The square root of 1143154157 is about 33810.5628021777. The cubic root of 1143154157 is about 1045.6064814334.

Adding to 1143154157 its reverse (7514513411), we get a palindrome (8657667568).

The spelling of 1143154157 in words is "one billion, one hundred forty-three million, one hundred fifty-four thousand, one hundred fifty-seven".