143020461 has 4 divisors (see below), whose sum is σ = 190693952. Its totient is φ = 95346972.

The previous prime is 143020459. The next prime is 143020469. The reversal of 143020461 is 164020341.

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: 164020341 = 3 ⋅54673447.

It is not a de Polignac number, because 143020461 - 2¹ = 143020459 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 (143020469) 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, 23836741 + ... + 23836746.

It is an arithmetic number, because the mean of its divisors is an integer number (47673488).

Almost surely, 2^143020461 is an apocalyptic number.

It is an amenable number.

143020461 is a deficient number, since it is larger than the sum of its proper divisors (47673491).

143020461 is an equidigital number, since it uses as much as digits as its factorization.

143020461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47673490.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 143020461 is about 11959.1162298892. The cubic root of 143020461 is about 522.9570930462.

The spelling of 143020461 in words is "one hundred forty-three million, twenty thousand, four hundred sixty-one".