1603665241 has 8 divisors (see below), whose sum is σ = 1626876680. Its totient is φ = 1580487552.

The previous prime is 1603665221. The next prime is 1603665257. The reversal of 1603665241 is 1425663061.

It can be written as a sum of positive squares in 4 ways, for example, as 43099225 + 1560566016 = 6565^2 + 39504^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1603665241 - 2¹⁷ = 1603534169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1603665197 and 1603665206.

It is not an unprimeable number, because it can be changed into a prime (1603665221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96631 + ... + 112003.

It is an arithmetic number, because the mean of its divisors is an integer number (203359585).

Almost surely, 2^1603665241 is an apocalyptic number.

It is an amenable number.

1603665241 is a deficient number, since it is larger than the sum of its proper divisors (23211439).

1603665241 is a wasteful number, since it uses less digits than its factorization.

1603665241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16875.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1603665241 is about 40045.7893042452. The cubic root of 1603665241 is about 1170.4995166608.

The spelling of 1603665241 in words is "one billion, six hundred three million, six hundred sixty-five thousand, two hundred forty-one".