1603431 has 12 divisors (see below), whose sum is σ = 2332408. Its totient is φ = 1061424.

The previous prime is 1603421. The next prime is 1603453. The reversal of 1603431 is 1343061.

It is not a de Polignac number, because 1603431 - 2⁹ = 1602919 is a prime.

It is a super-2 number, since 2×1603431² = 5141981943522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 921 + ... + 2013.

2^1603431 is an apocalyptic number.

1603431 is a deficient number, since it is larger than the sum of its proper divisors (728977).

1603431 is a wasteful number, since it uses less digits than its factorization.

1603431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1603431 is about 1266.2665596153. The cubic root of 1603431 is about 117.0442523817.

Adding to 1603431 its reverse (1343061), we get a palindrome (2946492).

The spelling of 1603431 in words is "one million, six hundred three thousand, four hundred thirty-one".