1201200545 has 4 divisors (see below), whose sum is σ = 1441440660. Its totient is φ = 960960432.

The previous prime is 1201200521. The next prime is 1201200547. The reversal of 1201200545 is 5450021021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5450021021 = 1907 ⋅2857903.

It can be written as a sum of positive squares in 2 ways, for example, as 509720929 + 691479616 = 22577^2 + 26296^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201200545 - 2⁸ = 1201200289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201200547) 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, 120120050 + ... + 120120059.

It is an arithmetic number, because the mean of its divisors is an integer number (360360165).

Almost surely, 2^1201200545 is an apocalyptic number.

It is an amenable number.

1201200545 is a deficient number, since it is larger than the sum of its proper divisors (240240115).

1201200545 is an equidigital number, since it uses as much as digits as its factorization.

1201200545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240240114.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1201200545 is about 34658.3401939562. The cubic root of 1201200545 is about 1063.0128314656.

Adding to 1201200545 its reverse (5450021021), we get a palindrome (6651221566).

The spelling of 1201200545 in words is "one billion, two hundred one million, two hundred thousand, five hundred forty-five".