1161008257 has 2 divisors, whose sum is σ = 1161008258. Its totient is φ = 1161008256.

The previous prime is 1161008239. The next prime is 1161008267. The reversal of 1161008257 is 7528001611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 803382336 + 357625921 = 28344^2 + 18911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161008257 - 2¹⁵ = 1160975489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161008267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580504128 + 580504129.

It is an arithmetic number, because the mean of its divisors is an integer number (580504129).

Almost surely, 2^1161008257 is an apocalyptic number.

It is an amenable number.

1161008257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161008257 is an equidigital number, since it uses as much as digits as its factorization.

1161008257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1161008257 is about 34073.5712393051. The cubic root of 1161008257 is about 1051.0219097172.

Adding to 1161008257 its reverse (7528001611), we get a palindrome (8689009868).

The spelling of 1161008257 in words is "one billion, one hundred sixty-one million, eight thousand, two hundred fifty-seven".