143012161 has 4 divisors (see below), whose sum is σ = 143124912. Its totient is φ = 142899412.

The previous prime is 143012159. The next prime is 143012171. The reversal of 143012161 is 161210341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161210341 = 10957 ⋅14713.

It is a cyclic number.

It is not a de Polignac number, because 143012161 - 2¹ = 143012159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143012131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54451 + ... + 57016.

It is an arithmetic number, because the mean of its divisors is an integer number (35781228).

Almost surely, 2^143012161 is an apocalyptic number.

It is an amenable number.

143012161 is a deficient number, since it is larger than the sum of its proper divisors (112751).

143012161 is a wasteful number, since it uses less digits than its factorization.

143012161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112750.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 143012161 is about 11958.7692092456. The cubic root of 143012161 is about 522.9469764801.

The spelling of 143012161 in words is "one hundred forty-three million, twelve thousand, one hundred sixty-one".