1156455281 has 2 divisors, whose sum is σ = 1156455282. Its totient is φ = 1156455280.

The previous prime is 1156455259. The next prime is 1156455319. The reversal of 1156455281 is 1825546511.

It is an a-pointer prime, because the next prime (1156455319) can be obtained adding 1156455281 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961992256 + 194463025 = 31016^2 + 13945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156455281 is a prime.

It is a super-2 number, since 2×1156455281² = 2674777633905577922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1156455211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578227640 + 578227641.

It is an arithmetic number, because the mean of its divisors is an integer number (578227641).

Almost surely, 2^1156455281 is an apocalyptic number.

It is an amenable number.

1156455281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156455281 is an equidigital number, since it uses as much as digits as its factorization.

1156455281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 38.

The square root of 1156455281 is about 34006.6946497304. The cubic root of 1156455281 is about 1049.6462242778.

The spelling of 1156455281 in words is "one billion, one hundred fifty-six million, four hundred fifty-five thousand, two hundred eighty-one".