1161423457 has 2 divisors, whose sum is σ = 1161423458. Its totient is φ = 1161423456.

The previous prime is 1161423443. The next prime is 1161423511. The reversal of 1161423457 is 7543241611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 916938961 + 244484496 = 30281^2 + 15636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161423457 - 2¹⁵ = 1161390689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161423427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580711728 + 580711729.

It is an arithmetic number, because the mean of its divisors is an integer number (580711729).

Almost surely, 2^1161423457 is an apocalyptic number.

It is an amenable number.

1161423457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161423457 is an equidigital number, since it uses as much as digits as its factorization.

1161423457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 1161423457 is about 34079.6633932907. The cubic root of 1161423457 is about 1051.1471836718.

The spelling of 1161423457 in words is "one billion, one hundred sixty-one million, four hundred twenty-three thousand, four hundred fifty-seven".