1161042901 has 2 divisors, whose sum is σ = 1161042902. Its totient is φ = 1161042900.

The previous prime is 1161042893. The next prime is 1161042917. The reversal of 1161042901 is 1092401611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145754801 + 15288100 = 33849^2 + 3910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161042901 - 2³ = 1161042893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161042941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580521450 + 580521451.

It is an arithmetic number, because the mean of its divisors is an integer number (580521451).

Almost surely, 2^1161042901 is an apocalyptic number.

It is an amenable number.

1161042901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161042901 is an equidigital number, since it uses as much as digits as its factorization.

1161042901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1161042901 is about 34074.0796060583. The cubic root of 1161042901 is about 1051.0323636310.

The spelling of 1161042901 in words is "one billion, one hundred sixty-one million, forty-two thousand, nine hundred one".