1163641 has 2 divisors, whose sum is σ = 1163642. Its totient is φ = 1163640.

The previous prime is 1163629. The next prime is 1163651. The reversal of 1163641 is 1463611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1071225 + 92416 = 1035^2 + 304^2 .

It is an emirp because it is prime and its reverse (1463611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1163641 - 2⁵ = 1163609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1163611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581820 + 581821.

It is an arithmetic number, because the mean of its divisors is an integer number (581821).

2^1163641 is an apocalyptic number.

It is an amenable number.

1163641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163641 is an equidigital number, since it uses as much as digits as its factorization.

1163641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 1163641 is about 1078.7219289511. The cubic root of 1163641 is about 105.1815754671.

The spelling of 1163641 in words is "one million, one hundred sixty-three thousand, six hundred forty-one".