143961 has 8 divisors (see below), whose sum is σ = 196224. Its totient is φ = 93840.

The previous prime is 143953. The next prime is 143971. The reversal of 143961 is 169341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 143961 - 2³ = 143953 is a prime.

143961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (143971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (24528).

2¹⁴³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

143961 is a deficient number, since it is larger than the sum of its proper divisors (52263).

143961 is a wasteful number, since it uses less digits than its factorization.

143961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 648, while the sum is 24.

The square root of 143961 is about 379.4219287284. The cubic root of 143961 is about 52.4100955627.

The spelling of 143961 in words is "one hundred forty-three thousand, nine hundred sixty-one".