1091403 has 6 divisors (see below), whose sum is σ = 1576484. Its totient is φ = 727596.

The previous prime is 1091401. The next prime is 1091411. The reversal of 1091403 is 3041901.

It is not a de Polignac number, because 1091403 - 2¹ = 1091401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60625 + ... + 60642.

2^1091403 is an apocalyptic number.

1091403 is a deficient number, since it is larger than the sum of its proper divisors (485081).

1091403 is a wasteful number, since it uses less digits than its factorization.

1091403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121273 (or 121270 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1091403 is about 1044.7023499543. The cubic root of 1091403 is about 102.9583832878.

The spelling of 1091403 in words is "one million, ninety-one thousand, four hundred three".