1142551544 has 8 divisors (see below), whose sum is σ = 2142284160. Its totient is φ = 571275768.

The previous prime is 1142551517. The next prime is 1142551549. The reversal of 1142551544 is 4451552411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1142551544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142551549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71409464 + ... + 71409479.

It is an arithmetic number, because the mean of its divisors is an integer number (267785520).

Almost surely, 2^1142551544 is an apocalyptic number.

It is an amenable number.

1142551544 is a deficient number, since it is larger than the sum of its proper divisors (999732616).

1142551544 is a wasteful number, since it uses less digits than its factorization.

1142551544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142818949 (or 142818945 counting only the distinct ones).

The product of its digits is 16000, while the sum is 32.

The square root of 1142551544 is about 33801.6500188970. The cubic root of 1142551544 is about 1045.4227188716.

The spelling of 1142551544 in words is "one billion, one hundred forty-two million, five hundred fifty-one thousand, five hundred forty-four".