143897 has 4 divisors (see below), whose sum is σ = 154980. Its totient is φ = 132816.

The previous prime is 143881. The next prime is 143909. The reversal of 143897 is 798341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798341 = 29 ⋅27529.

It can be written as a sum of positive squares in 2 ways, for example, as 17161 + 126736 = 131^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 143897 - 2⁴ = 143881 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143897.

It is not an unprimeable number, because it can be changed into a prime (143807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (38745).

2¹⁴³⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

143897 is a deficient number, since it is larger than the sum of its proper divisors (11083).

143897 is a wasteful number, since it uses less digits than its factorization.

143897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11082.

The product of its digits is 6048, while the sum is 32.

The square root of 143897 is about 379.3375805269. The cubic root of 143897 is about 52.4023278495.

It can be divided in two parts, 143 and 897, that multiplied together give a triangular number (128271 = T₅₀₆).

The spelling of 143897 in words is "one hundred forty-three thousand, eight hundred ninety-seven".