143197541 has 4 divisors (see below), whose sum is σ = 144290784. Its totient is φ = 142104300.

The previous prime is 143197507. The next prime is 143197553. The reversal of 143197541 is 145791341.

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: 145791341 = 131 ⋅1112911.

It is a cyclic number.

It is not a de Polignac number, because 143197541 - 2¹⁰ = 143196517 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 (143197591) 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, 546425 + ... + 546686.

It is an arithmetic number, because the mean of its divisors is an integer number (36072696).

Almost surely, 2^143197541 is an apocalyptic number.

It is an amenable number.

143197541 is a deficient number, since it is larger than the sum of its proper divisors (1093243).

143197541 is a wasteful number, since it uses less digits than its factorization.

143197541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093242.

The product of its digits is 15120, while the sum is 35.

The square root of 143197541 is about 11966.5174967490. The cubic root of 143197541 is about 523.1728361833.

The spelling of 143197541 in words is "one hundred forty-three million, one hundred ninety-seven thousand, five hundred forty-one".