142240135994 has 12 divisors (see below), whose sum is σ = 234519894042. Its totient is φ = 64654607160.

The previous prime is 142240135981. The next prime is 142240136039. The reversal of 142240135994 is 499531042241.

It can be written as a sum of positive squares in only one way, i.e., 142081501969 + 158634025 = 376937^2 + 12595^2 .

It is a super-2 number, since 2×142240135994² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293884337 + ... + 293884820.

Almost surely, 2^142240135994 is an apocalyptic number.

142240135994 is a deficient number, since it is larger than the sum of its proper divisors (92279758048).

142240135994 is a wasteful number, since it uses less digits than its factorization.

142240135994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587769181 (or 587769170 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 142240135994 in words is "one hundred forty-two billion, two hundred forty million, one hundred thirty-five thousand, nine hundred ninety-four".