1003440561 has 16 divisors (see below), whose sum is σ = 1375106304. Its totient is φ = 650505744.

The previous prime is 1003440547. The next prime is 1003440563. The reversal of 1003440561 is 1650443001.

It is not a de Polignac number, because 1003440561 - 2¹⁰ = 1003439537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1003440563) 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, 12150 + ... + 46416.

It is an arithmetic number, because the mean of its divisors is an integer number (85944144).

Almost surely, 2^1003440561 is an apocalyptic number.

It is an amenable number.

1003440561 is a deficient number, since it is larger than the sum of its proper divisors (371665743).

1003440561 is a wasteful number, since it uses less digits than its factorization.

1003440561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34540.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1003440561 is about 31677.1299362805. The cubic root of 1003440561 is about 1001.1455409016.

Adding to 1003440561 its reverse (1650443001), we get a palindrome (2653883562).

It can be divided in two parts, 1003440 and 561, that added together give a palindrome (1004001).

The spelling of 1003440561 in words is "one billion, three million, four hundred forty thousand, five hundred sixty-one".