1242152505 has 48 divisors (see below), whose sum is σ = 2429818560. Its totient is φ = 581481600.

The previous prime is 1242152497. The next prime is 1242152507. The reversal of 1242152505 is 5052512421.

1242152505 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 152 + 505 = 666.

It is not a de Polignac number, because 1242152505 - 2³ = 1242152497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1242152507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28911 + ... + 57620.

It is an arithmetic number, because the mean of its divisors is an integer number (50621220).

Almost surely, 2^1242152505 is an apocalyptic number.

1242152505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242152505 is a deficient number, since it is larger than the sum of its proper divisors (1187666055).

1242152505 is a wasteful number, since it uses less digits than its factorization.

1242152505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86582 (or 86579 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1242152505 is about 35244.1839882838. The cubic root of 1242152505 is about 1074.9583556970.

Adding to 1242152505 its reverse (5052512421), we get a palindrome (6294664926).

The spelling of 1242152505 in words is "one billion, two hundred forty-two million, one hundred fifty-two thousand, five hundred five".