1242140144 has 40 divisors (see below), whose sum is σ = 2755478400. Its totient is φ = 531373248.

The previous prime is 1242140131. The next prime is 1242140161. The reversal of 1242140144 is 4410412421.

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, 53207 + ... + 72905.

It is an arithmetic number, because the mean of its divisors is an integer number (68886960).

Almost surely, 2^1242140144 is an apocalyptic number.

1242140144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1242140144 is an abundant number, since it is smaller than the sum of its proper divisors (1513338256).

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

1242140144 is a wasteful number, since it uses less digits than its factorization.

1242140144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20277 (or 20271 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1242140144 is about 35244.0086255806. The cubic root of 1242140144 is about 1074.9547899501.

Adding to 1242140144 its reverse (4410412421), we get a palindrome (5652552565).

The spelling of 1242140144 in words is "one billion, two hundred forty-two million, one hundred forty thousand, one hundred forty-four".