143672021 has 4 divisors (see below), whose sum is σ = 146107200. Its totient is φ = 141236844.

The previous prime is 143672017. The next prime is 143672069. The reversal of 143672021 is 120276341.

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: 120276341 = 401 ⋅299941.

It is a cyclic number.

It is not a de Polignac number, because 143672021 - 2² = 143672017 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 (143672621) 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, 1217501 + ... + 1217618.

It is an arithmetic number, because the mean of its divisors is an integer number (36526800).

Almost surely, 2^143672021 is an apocalyptic number.

It is an amenable number.

143672021 is a deficient number, since it is larger than the sum of its proper divisors (2435179).

143672021 is an equidigital number, since it uses as much as digits as its factorization.

143672021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435178.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 143672021 is about 11986.3264180482. The cubic root of 143672021 is about 523.7500373849.

The spelling of 143672021 in words is "one hundred forty-three million, six hundred seventy-two thousand, twenty-one".