1305424061 has 4 divisors (see below), whose sum is σ = 1307604000. Its totient is φ = 1303244124.

The previous prime is 1305424037. The next prime is 1305424093. The reversal of 1305424061 is 1604245031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305424061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1305424061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305424261) 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, 1089071 + ... + 1090268.

It is an arithmetic number, because the mean of its divisors is an integer number (326901000).

Almost surely, 2^1305424061 is an apocalyptic number.

It is an amenable number.

1305424061 is a deficient number, since it is larger than the sum of its proper divisors (2179939).

1305424061 is an equidigital number, since it uses as much as digits as its factorization.

1305424061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179938.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1305424061 is about 36130.6526511770. The cubic root of 1305424061 is about 1092.9086695897.

Adding to 1305424061 its reverse (1604245031), we get a palindrome (2909669092).

The spelling of 1305424061 in words is "one billion, three hundred five million, four hundred twenty-four thousand, sixty-one".