1603091 has 16 divisors (see below), whose sum is σ = 1944000. Its totient is φ = 1292928.

The previous prime is 1603081. The next prime is 1603093. The reversal of 1603091 is 1903061.

It is not a de Polignac number, because 1603091 - 2⁶ = 1603027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1603093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10685 + ... + 10833.

It is an arithmetic number, because the mean of its divisors is an integer number (121500).

2^1603091 is an apocalyptic number.

1603091 is a deficient number, since it is larger than the sum of its proper divisors (340909).

1603091 is a wasteful number, since it uses less digits than its factorization.

1603091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1603091 is about 1266.1322995643. The cubic root of 1603091 is about 117.0359789025.

The spelling of 1603091 in words is "one million, six hundred three thousand, ninety-one".