1155403 has 2 divisors, whose sum is σ = 1155404. Its totient is φ = 1155402.

The previous prime is 1155379. The next prime is 1155419. The reversal of 1155403 is 3045511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155403 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1155703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577701 + 577702.

It is an arithmetic number, because the mean of its divisors is an integer number (577702).

2^1155403 is an apocalyptic number.

1155403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155403 is an equidigital number, since it uses as much as digits as its factorization.

1155403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1155403 is about 1074.8967392266. The cubic root of 1155403 is about 104.9327763208.

The spelling of 1155403 in words is "one million, one hundred fifty-five thousand, four hundred three".