1142555020 has 48 divisors (see below), whose sum is σ = 2450585088. Its totient is φ = 447353280.

The previous prime is 1142554981. The next prime is 1142555039. The reversal of 1142555020 is 205552411.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215805 + ... + 221035.

It is an arithmetic number, because the mean of its divisors is an integer number (51053856).

Almost surely, 2^1142555020 is an apocalyptic number.

1142555020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142555020 is an abundant number, since it is smaller than the sum of its proper divisors (1308030068).

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

1142555020 is a wasteful number, since it uses less digits than its factorization.

1142555020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470 (or 5468 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1142555020 is about 33801.7014364662. The cubic root of 1142555020 is about 1045.4237790385.

The spelling of 1142555020 in words is "one billion, one hundred forty-two million, five hundred fifty-five thousand, twenty".