1142404144 has 20 divisors (see below), whose sum is σ = 2529609424. Its totient is φ = 489601728.

The previous prime is 1142404121. The next prime is 1142404147. The reversal of 1142404144 is 4414042411.

It is not an unprimeable number, because it can be changed into a prime (1142404147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5099907 + ... + 5100130.

Almost surely, 2^1142404144 is an apocalyptic number.

1142404144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1142404144 is an abundant number, since it is smaller than the sum of its proper divisors (1387205280).

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

1142404144 is a wasteful number, since it uses less digits than its factorization.

1142404144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200052 (or 10200046 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 1142404144 is about 33799.4695816369. The cubic root of 1142404144 is about 1045.3777604519.

Adding to 1142404144 its reverse (4414042411), we get a palindrome (5556446555).

The spelling of 1142404144 in words is "one billion, one hundred forty-two million, four hundred four thousand, one hundred forty-four".