143621172 has 18 divisors (see below), whose sum is σ = 363042498. Its totient is φ = 47873712.

The previous prime is 143621167. The next prime is 143621183. The reversal of 143621172 is 271126341.

143621172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 132572196 + 11048976 = 11514^2 + 3324^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1994703 + ... + 1994774.

Almost surely, 2^143621172 is an apocalyptic number.

143621172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

143621172 is an abundant number, since it is smaller than the sum of its proper divisors (219421326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143621172 is a wasteful number, since it uses less digits than its factorization.

143621172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989487 (or 3989482 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 143621172 is about 11984.2051050539. The cubic root of 143621172 is about 523.6882408291.

The spelling of 143621172 in words is "one hundred forty-three million, six hundred twenty-one thousand, one hundred seventy-two".