1201549143 has 8 divisors (see below), whose sum is σ = 1602259056. Its totient is φ = 800936000.

The previous prime is 1201549093. The next prime is 1201549163. The reversal of 1201549143 is 3419451021.

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 1201549143 - 2⁹ = 1201548631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201549143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201549163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12913 + ... + 50693.

It is an arithmetic number, because the mean of its divisors is an integer number (200282382).

Almost surely, 2^1201549143 is an apocalyptic number.

1201549143 is a deficient number, since it is larger than the sum of its proper divisors (400709913).

1201549143 is a wasteful number, since it uses less digits than its factorization.

1201549143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48385.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1201549143 is about 34663.3688928240. The cubic root of 1201549143 is about 1063.1156531266.

The spelling of 1201549143 in words is "one billion, two hundred one million, five hundred forty-nine thousand, one hundred forty-three".