1305897485 has 4 divisors (see below), whose sum is σ = 1567076988. Its totient is φ = 1044717984.

The previous prime is 1305897451. The next prime is 1305897497. The reversal of 1305897485 is 5847985031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 956170084 + 349727401 = 30922^2 + 18701^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305897485 - 2²⁸ = 1037462029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130589744 + ... + 130589753.

It is an arithmetic number, because the mean of its divisors is an integer number (391769247).

Almost surely, 2^1305897485 is an apocalyptic number.

It is an amenable number.

1305897485 is a deficient number, since it is larger than the sum of its proper divisors (261179503).

1305897485 is an equidigital number, since it uses as much as digits as its factorization.

1305897485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261179502.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The square root of 1305897485 is about 36137.2036134508. The cubic root of 1305897485 is about 1093.0407714035.

The spelling of 1305897485 in words is "one billion, three hundred five million, eight hundred ninety-seven thousand, four hundred eighty-five".