1167601261 has 2 divisors, whose sum is σ = 1167601262. Its totient is φ = 1167601260.

The previous prime is 1167601247. The next prime is 1167601291. The reversal of 1167601261 is 1621067611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1057225225 + 110376036 = 32515^2 + 10506^2 .

It is an emirp because it is prime and its reverse (1621067611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1167601261 - 2⁵ = 1167601229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1167601241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583800630 + 583800631.

It is an arithmetic number, because the mean of its divisors is an integer number (583800631).

Almost surely, 2^1167601261 is an apocalyptic number.

It is an amenable number.

1167601261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1167601261 is an equidigital number, since it uses as much as digits as its factorization.

1167601261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1167601261 is about 34170.1808745579. The cubic root of 1167601261 is about 1053.0076309554.

Adding to 1167601261 its reverse (1621067611), we get a palindrome (2788668872).

The spelling of 1167601261 in words is "one billion, one hundred sixty-seven million, six hundred one thousand, two hundred sixty-one".