1242536505 has 32 divisors (see below), whose sum is σ = 2314946304. Its totient is φ = 557296896.

The previous prime is 1242536489. The next prime is 1242536531. The reversal of 1242536505 is 5056352421.

It is not a de Polignac number, because 1242536505 - 2⁴ = 1242536489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106074 + ... + 117203.

It is an arithmetic number, because the mean of its divisors is an integer number (72342072).

Almost surely, 2^1242536505 is an apocalyptic number.

1242536505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242536505 is a deficient number, since it is larger than the sum of its proper divisors (1072409799).

1242536505 is a wasteful number, since it uses less digits than its factorization.

1242536505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223345.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 1242536505 is about 35249.6312746673. The cubic root of 1242536505 is about 1075.0691154409.

Adding to 1242536505 its reverse (5056352421), we get a palindrome (6298888926).

The spelling of 1242536505 in words is "one billion, two hundred forty-two million, five hundred thirty-six thousand, five hundred five".