1242145524 has 24 divisors (see below), whose sum is σ = 2953026720. Its totient is φ = 406236064.

The previous prime is 1242145517. The next prime is 1242145549. The reversal of 1242145524 is 4255412421.

It is a junction number, because it is equal to n+sod(n) for n = 1242145491 and 1242145500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975894 + ... + 977165.

It is an arithmetic number, because the mean of its divisors is an integer number (123042780).

Almost surely, 2^1242145524 is an apocalyptic number.

It is an amenable number.

1242145524 is an abundant number, since it is smaller than the sum of its proper divisors (1710881196).

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

1242145524 is a wasteful number, since it uses less digits than its factorization.

1242145524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953119 (or 1953117 counting only the distinct ones).

The product of its digits is 12800, while the sum is 30.

The square root of 1242145524 is about 35244.0849505275. The cubic root of 1242145524 is about 1074.9563419082.

Adding to 1242145524 its reverse (4255412421), we get a palindrome (5497557945).

The spelling of 1242145524 in words is "one billion, two hundred forty-two million, one hundred forty-five thousand, five hundred twenty-four".