1351242005 has 8 divisors (see below), whose sum is σ = 1622543832. Its totient is φ = 1080291328.

The previous prime is 1351241999. The next prime is 1351242077. The reversal of 1351242005 is 5002421531.

It can be written as a sum of positive squares in 4 ways, for example, as 214271044 + 1136970961 = 14638^2 + 33719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351242005 - 2⁴ = 1351241989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79244 + ... + 94773.

It is an arithmetic number, because the mean of its divisors is an integer number (202817979).

Almost surely, 2^1351242005 is an apocalyptic number.

It is an amenable number.

1351242005 is a deficient number, since it is larger than the sum of its proper divisors (271301827).

1351242005 is a wasteful number, since it uses less digits than its factorization.

1351242005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175575.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1351242005 is about 36759.2438034299. The cubic root of 1351242005 is about 1105.5482779679.

Adding to 1351242005 its reverse (5002421531), we get a palindrome (6353663536).

The spelling of 1351242005 in words is "one billion, three hundred fifty-one million, two hundred forty-two thousand, five".