1105649 has 2 divisors, whose sum is σ = 1105650. Its totient is φ = 1105648.

The previous prime is 1105639. The next prime is 1105651. The reversal of 1105649 is 9465011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970225 + 135424 = 985^2 + 368^2 .

It is an emirp because it is prime and its reverse (9465011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1105649 - 2¹⁶ = 1040113 is a prime.

It is a super-2 number, since 2×1105649² = 2444919422402, which contains 22 as substring.

Together with 1105651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1105609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552824 + 552825.

It is an arithmetic number, because the mean of its divisors is an integer number (552825).

2^1105649 is an apocalyptic number.

It is an amenable number.

1105649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105649 is an equidigital number, since it uses as much as digits as its factorization.

1105649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1105649 is about 1051.4984545875. The cubic root of 1105649 is about 103.4044175015.

The spelling of 1105649 in words is "one million, one hundred five thousand, six hundred forty-nine".