1142142123394 has 4 divisors (see below), whose sum is σ = 1713213185094. Its totient is φ = 571071061696.

The previous prime is 1142142123391. The next prime is 1142142123461. The reversal of 1142142123394 is 4933212412411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1119713167225 + 22428956169 = 1058165^2 + 149763^2 .

It is not an unprimeable number, because it can be changed into a prime (1142142123391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285535530847 + ... + 285535530850.

Almost surely, 2^{1142142123394} is an apocalyptic number.

1142142123394 is a deficient number, since it is larger than the sum of its proper divisors (571071061700).

1142142123394 is an equidigital number, since it uses as much as digits as its factorization.

1142142123394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571071061699.

The product of its digits is 41472, while the sum is 37.

The spelling of 1142142123394 in words is "one trillion, one hundred forty-two billion, one hundred forty-two million, one hundred twenty-three thousand, three hundred ninety-four".