143520061 has 4 divisors (see below), whose sum is σ = 143694432. Its totient is φ = 143345692.

The previous prime is 143520059. The next prime is 143520067. The reversal of 143520061 is 160025341.

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: 160025341 = 7 ⋅22860763.

It is a cyclic number.

It is not a de Polignac number, because 143520061 - 2¹ = 143520059 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 (143520067) 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, 85945 + ... + 87598.

It is an arithmetic number, because the mean of its divisors is an integer number (35923608).

Almost surely, 2^143520061 is an apocalyptic number.

It is an amenable number.

143520061 is a deficient number, since it is larger than the sum of its proper divisors (174371).

143520061 is an equidigital number, since it uses as much as digits as its factorization.

143520061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174370.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 143520061 is about 11979.9858514107. The cubic root of 143520061 is about 523.5653177442.

The spelling of 143520061 in words is "one hundred forty-three million, five hundred twenty thousand, sixty-one".