1154561 has 2 divisors, whose sum is σ = 1154562. Its totient is φ = 1154560.

The previous prime is 1154551. The next prime is 1154563. The reversal of 1154561 is 1654511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 442225 = 844^2 + 665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1154561 is a prime.

It is a super-2 number, since 2×1154561² = 2666022205442, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1154563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1154563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577280 + 577281.

It is an arithmetic number, because the mean of its divisors is an integer number (577281).

2^1154561 is an apocalyptic number.

It is an amenable number.

1154561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154561 is an equidigital number, since it uses as much as digits as its factorization.

1154561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 1154561 is about 1074.5050023150. The cubic root of 1154561 is about 104.9072802042.

The spelling of 1154561 in words is "one million, one hundred fifty-four thousand, five hundred sixty-one".