1561413003 has 4 divisors (see below), whose sum is σ = 2081884008. Its totient is φ = 1040942000.

The previous prime is 1561412969. The next prime is 1561413031. The reversal of 1561413003 is 3003141651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1561413003 - 2⁸ = 1561412747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1561413083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260235498 + ... + 260235503.

It is an arithmetic number, because the mean of its divisors is an integer number (520471002).

Almost surely, 2^1561413003 is an apocalyptic number.

1561413003 is a deficient number, since it is larger than the sum of its proper divisors (520471005).

1561413003 is an equidigital number, since it uses as much as digits as its factorization.

1561413003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520471004.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1561413003 is about 39514.7188146392. The cubic root of 1561413003 is about 1160.1280583456.

Adding to 1561413003 its reverse (3003141651), we get a palindrome (4564554654).

The spelling of 1561413003 in words is "one billion, five hundred sixty-one million, four hundred thirteen thousand, three".