143420531 has 8 divisors (see below), whose sum is σ = 151739280. Its totient is φ = 135178848.

The previous prime is 143420521. The next prime is 143420533. The reversal of 143420531 is 135024341.

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 143420531 - 2⁶ = 143420467 is a prime.

It is a super-2 number, since 2×143420531² = 41138897424643922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143420497 and 143420506.

It is not an unprimeable number, because it can be changed into a prime (143420533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15416 + ... + 22901.

It is an arithmetic number, because the mean of its divisors is an integer number (18967410).

Almost surely, 2^143420531 is an apocalyptic number.

143420531 is a deficient number, since it is larger than the sum of its proper divisors (8318749).

143420531 is a wasteful number, since it uses less digits than its factorization.

143420531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38533.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 143420531 is about 11975.8311193837. The cubic root of 143420531 is about 523.4442603199. Note that the first 3 decimals are identical.

Adding to 143420531 its reverse (135024341), we get a palindrome (278444872).

The spelling of 143420531 in words is "one hundred forty-three million, four hundred twenty thousand, five hundred thirty-one".