1201520543 has 16 divisors (see below), whose sum is σ = 1287990720. Its totient is φ = 1116864000.

The previous prime is 1201520471. The next prime is 1201520557. The reversal of 1201520543 is 3450251021.

It is a cyclic number.

It is not a de Polignac number, because 1201520543 - 2²⁴ = 1184743327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201520143) 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, 1082873 + ... + 1083981.

It is an arithmetic number, because the mean of its divisors is an integer number (80499420).

Almost surely, 2^1201520543 is an apocalyptic number.

1201520543 is a deficient number, since it is larger than the sum of its proper divisors (86470177).

1201520543 is a wasteful number, since it uses less digits than its factorization.

1201520543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1201520543 is about 34662.9563511250. The cubic root of 1201520543 is about 1063.1072180856.

Adding to 1201520543 its reverse (3450251021), we get a palindrome (4651771564).

The spelling of 1201520543 in words is "one billion, two hundred one million, five hundred twenty thousand, five hundred forty-three".