1142557044 has 12 divisors (see below), whose sum is σ = 2665966464. Its totient is φ = 380852344.

The previous prime is 1142557043. The next prime is 1142557081. The reversal of 1142557044 is 4407552411.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1142556996 and 1142557014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142557043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47606532 + ... + 47606555.

It is an arithmetic number, because the mean of its divisors is an integer number (222163872).

Almost surely, 2^1142557044 is an apocalyptic number.

It is an amenable number.

1142557044 is an abundant number, since it is smaller than the sum of its proper divisors (1523409420).

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

1142557044 is a wasteful number, since it uses less digits than its factorization.

1142557044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95213094 (or 95213092 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 1142557044 is about 33801.7313757742. The cubic root of 1142557044 is about 1045.4243963498.

The spelling of 1142557044 in words is "one billion, one hundred forty-two million, five hundred fifty-seven thousand, forty-four".