1308240025 has 12 divisors (see below), whose sum is σ = 1678157100. Its totient is φ = 1010502080.

The previous prime is 1308240001. The next prime is 1308240053. The reversal of 1308240025 is 5200428031.

It can be written as a sum of positive squares in 6 ways, for example, as 35748441 + 1272491584 = 5979^2 + 35672^2 .

It is not a de Polignac number, because 1308240025 - 2⁵ = 1308239993 is a prime.

It is a super-2 number, since 2×1308240025² = 3422983926024001250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 901510 + ... + 902959.

It is an arithmetic number, because the mean of its divisors is an integer number (139846425).

Almost surely, 2^1308240025 is an apocalyptic number.

It is an amenable number.

1308240025 is a deficient number, since it is larger than the sum of its proper divisors (369917075).

1308240025 is a wasteful number, since it uses less digits than its factorization.

1308240025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804508 (or 1804503 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1308240025 is about 36169.6008410378. The cubic root of 1308240025 is about 1093.6939523933.

Adding to 1308240025 its reverse (5200428031), we get a palindrome (6508668056).

The spelling of 1308240025 in words is "one billion, three hundred eight million, two hundred forty thousand, twenty-five".