1305242025 has 12 divisors (see below), whose sum is σ = 2158000272. Its totient is φ = 696129040.

The previous prime is 1305242021. The next prime is 1305242039. The reversal of 1305242025 is 5202425031.

It is not a de Polignac number, because 1305242025 - 2² = 1305242021 is a prime.

It is a super-2 number, since 2×1305242025² = 3407313487652201250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1305241986 and 1305242004.

It is not an unprimeable number, because it can be changed into a prime (1305242021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8701539 + ... + 8701688.

It is an arithmetic number, because the mean of its divisors is an integer number (179833356).

Almost surely, 2^1305242025 is an apocalyptic number.

1305242025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305242025 is a deficient number, since it is larger than the sum of its proper divisors (852758247).

1305242025 is a wasteful number, since it uses less digits than its factorization.

1305242025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17403240 (or 17403235 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1305242025 is about 36128.1334281194. The cubic root of 1305242025 is about 1092.8578666930.

Adding to 1305242025 its reverse (5202425031), we get a palindrome (6507667056).

The spelling of 1305242025 in words is "one billion, three hundred five million, two hundred forty-two thousand, twenty-five".