143646142 has 4 divisors (see below), whose sum is σ = 215469216. Its totient is φ = 71823070.

The previous prime is 143646127. The next prime is 143646143. The reversal of 143646142 is 241646341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241646341 = 4561 ⋅52981.

It is a super-2 number, since 2×143646142² = 41268428222968328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143646143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35911534 + ... + 35911537.

It is an arithmetic number, because the mean of its divisors is an integer number (53867304).

Almost surely, 2^143646142 is an apocalyptic number.

143646142 is a deficient number, since it is larger than the sum of its proper divisors (71823074).

143646142 is an equidigital number, since it uses as much as digits as its factorization.

143646142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71823073.

The product of its digits is 13824, while the sum is 31.

The square root of 143646142 is about 11985.2468476874. The cubic root of 143646142 is about 523.7185885776.

The spelling of 143646142 in words is "one hundred forty-three million, six hundred forty-six thousand, one hundred forty-two".