1142981147 has 16 divisors (see below), whose sum is σ = 1474156800. Its totient is φ = 859921440.

The previous prime is 1142981143. The next prime is 1142981173. The reversal of 1142981147 is 7411892411.

It is not a de Polignac number, because 1142981147 - 2² = 1142981143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142981147.

It is not an unprimeable number, because it can be changed into a prime (1142981141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253697 + ... + 258162.

It is an arithmetic number, because the mean of its divisors is an integer number (92134800).

Almost surely, 2^1142981147 is an apocalyptic number.

1142981147 is a deficient number, since it is larger than the sum of its proper divisors (331175653).

1142981147 is a wasteful number, since it uses less digits than its factorization.

1142981147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511906.

The product of its digits is 16128, while the sum is 38.

The square root of 1142981147 is about 33808.0041853996. The cubic root of 1142981147 is about 1045.5537298708.

It can be divided in two parts, 1142 and 981147, that added together give a palindrome (982289).

The spelling of 1142981147 in words is "one billion, one hundred forty-two million, nine hundred eighty-one thousand, one hundred forty-seven".