1242145512 has 48 divisors (see below), whose sum is σ = 3446204580. Its totient is φ = 403948800.

The previous prime is 1242145493. The next prime is 1242145517. The reversal of 1242145512 is 2155412421.

It is a happy number.

1242145512 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 145 + 512 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1161037476 + 81108036 = 34074^2 + 9006^2 .

It is not an unprimeable number, because it can be changed into a prime (1242145517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207439 + ... + 213342.

Almost surely, 2^1242145512 is an apocalyptic number.

1242145512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1242145512 is an abundant number, since it is smaller than the sum of its proper divisors (2204059068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242145512 is a wasteful number, since it uses less digits than its factorization.

1242145512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420834 (or 420827 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1242145512 is about 35244.0847802862. The cubic root of 1242145512 is about 1074.9563384466.

Adding to 1242145512 its reverse (2155412421), we get a palindrome (3397557933).

The spelling of 1242145512 in words is "one billion, two hundred forty-two million, one hundred forty-five thousand, five hundred twelve".