1143265601 has 2 divisors, whose sum is σ = 1143265602. Its totient is φ = 1143265600.

The previous prime is 1143265567. The next prime is 1143265603. The reversal of 1143265601 is 1065623411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1082410000 + 60855601 = 32900^2 + 7801^2 .

It is an emirp because it is prime and its reverse (1065623411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143265601 is a prime.

Together with 1143265603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1143265603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571632800 + 571632801.

It is an arithmetic number, because the mean of its divisors is an integer number (571632801).

Almost surely, 2^1143265601 is an apocalyptic number.

It is an amenable number.

1143265601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143265601 is an equidigital number, since it uses as much as digits as its factorization.

1143265601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1143265601 is about 33812.2108268596. The cubic root of 1143265601 is about 1045.6404584148.

The spelling of 1143265601 in words is "one billion, one hundred forty-three million, two hundred sixty-five thousand, six hundred one".