143521456 has 80 divisors (see below), whose sum is σ = 312729984. Its totient is φ = 63378432.

The previous prime is 143521447. The next prime is 143521457. The reversal of 143521456 is 654125341.

It is a happy number.

143521456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (143521457) 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, 517990 + ... + 518266.

Almost surely, 2^143521456 is an apocalyptic number.

143521456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143521456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156364992).

143521456 is an abundant number, since it is smaller than the sum of its proper divisors (169208528).

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

143521456 is a wasteful number, since it uses less digits than its factorization.

143521456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 392 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 143521456 is about 11980.0440733747. The cubic root of 143521456 is about 523.5670140721.

Adding to 143521456 its reverse (654125341), we get a palindrome (797646797).

The spelling of 143521456 in words is "one hundred forty-three million, five hundred twenty-one thousand, four hundred fifty-six".