1305015245 has 4 divisors (see below), whose sum is σ = 1566018300. Its totient is φ = 1044012192.

The previous prime is 1305015221. The next prime is 1305015263. The reversal of 1305015245 is 5425105031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5425105031 = 22697 ⋅239023.

It can be written as a sum of positive squares in 2 ways, for example, as 315346564 + 989668681 = 17758^2 + 31459^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305015245 - 2⁸ = 1305014989 is a prime.

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, 130501520 + ... + 130501529.

It is an arithmetic number, because the mean of its divisors is an integer number (391504575).

Almost surely, 2^1305015245 is an apocalyptic number.

It is an amenable number.

1305015245 is a deficient number, since it is larger than the sum of its proper divisors (261003055).

1305015245 is an equidigital number, since it uses as much as digits as its factorization.

1305015245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261003054.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1305015245 is about 36124.9947404840. The cubic root of 1305015245 is about 1092.7945699615.

The spelling of 1305015245 in words is "one billion, three hundred five million, fifteen thousand, two hundred forty-five".