1242515505 has 32 divisors (see below), whose sum is σ = 2478578688. Its totient is φ = 516369600.

The previous prime is 1242515503. The next prime is 1242515509. The reversal of 1242515505 is 5055152421.

It is not a de Polignac number, because 1242515505 - 2¹ = 1242515503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242515501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536731 + ... + 539040.

It is an arithmetic number, because the mean of its divisors is an integer number (77455584).

Almost surely, 2^1242515505 is an apocalyptic number.

1242515505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242515505 is a deficient number, since it is larger than the sum of its proper divisors (1236063183).

1242515505 is a wasteful number, since it uses less digits than its factorization.

1242515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075797.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 1242515505 is about 35249.3333979524. Note that the first 4 decimals coincide. The cubic root of 1242515505 is about 1075.0630588573.

Adding to 1242515505 its reverse (5055152421), we get a palindrome (6297667926).

The spelling of 1242515505 in words is "one billion, two hundred forty-two million, five hundred fifteen thousand, five hundred five".