143001661 has 8 divisors (see below), whose sum is σ = 156088800. Its totient is φ = 129929040.

The previous prime is 143001647. The next prime is 143001679. The reversal of 143001661 is 166100341.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 143001661 - 2¹⁵ = 142968893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143001611) 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, 33855 + ... + 37843.

It is an arithmetic number, because the mean of its divisors is an integer number (19511100).

Almost surely, 2^143001661 is an apocalyptic number.

143001661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143001661 is a deficient number, since it is larger than the sum of its proper divisors (13087139).

143001661 is a wasteful number, since it uses less digits than its factorization.

143001661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 143001661 is about 11958.3301927987. The cubic root of 143001661 is about 522.9341778538.

The spelling of 143001661 in words is "one hundred forty-three million, one thousand, six hundred sixty-one".