1201543 has 16 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 925056.

The previous prime is 1201531. The next prime is 1201553. The reversal of 1201543 is 3451021.

It is a cyclic number.

It is not a de Polignac number, because 1201543 - 2¹³ = 1193351 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 (1201513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2518 + ... + 2956.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^1201543 is an apocalyptic number.

1201543 is a deficient number, since it is larger than the sum of its proper divisors (319097).

1201543 is a wasteful number, since it uses less digits than its factorization.

1201543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1201543 is about 1096.1491686810. The cubic root of 1201543 is about 106.3113841374.

Adding to 1201543 its reverse (3451021), we get a palindrome (4652564).

The spelling of 1201543 in words is "one million, two hundred one thousand, five hundred forty-three".