1242534005 has 4 divisors (see below), whose sum is σ = 1491040812. Its totient is φ = 994027200.

The previous prime is 1242534001. The next prime is 1242534031. The reversal of 1242534005 is 5004352421.

It is a happy number.

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 571879396 + 670654609 = 23914^2 + 25897^2 .

It is not a de Polignac number, because 1242534005 - 2² = 1242534001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242534001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124253396 + ... + 124253405.

It is an arithmetic number, because the mean of its divisors is an integer number (372760203).

Almost surely, 2^1242534005 is an apocalyptic number.

It is an amenable number.

1242534005 is a deficient number, since it is larger than the sum of its proper divisors (248506807).

1242534005 is an equidigital number, since it uses as much as digits as its factorization.

1242534005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248506806.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1242534005 is about 35249.5958132856. The cubic root of 1242534005 is about 1075.0683944226.

Adding to 1242534005 its reverse (5004352421), we get a palindrome (6246886426).

The spelling of 1242534005 in words is "one billion, two hundred forty-two million, five hundred thirty-four thousand, five".