143643621 has 16 divisors (see below), whose sum is σ = 212880960. Its totient is φ = 85413120.

The previous prime is 143643611. The next prime is 143643737. The reversal of 143643621 is 126346341.

It is not a de Polignac number, because 143643621 - 2⁵ = 143643589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143643601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39316 + ... + 42813.

It is an arithmetic number, because the mean of its divisors is an integer number (13305060).

Almost surely, 2^143643621 is an apocalyptic number.

143643621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143643621 is a deficient number, since it is larger than the sum of its proper divisors (69237339).

143643621 is a wasteful number, since it uses less digits than its factorization.

143643621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82196.

The product of its digits is 10368, while the sum is 30.

The square root of 143643621 is about 11985.1416762590. The cubic root of 143643621 is about 523.7155247935.

Adding to 143643621 its reverse (126346341), we get a palindrome (269989962).

The spelling of 143643621 in words is "one hundred forty-three million, six hundred forty-three thousand, six hundred twenty-one".