1201226545 has 16 divisors (see below), whose sum is σ = 1578897360. Its totient is φ = 873263104.

The previous prime is 1201226539. The next prime is 1201226567. The reversal of 1201226545 is 5456221021.

It can be written as a sum of positive squares in 8 ways, for example, as 1227664 + 1199998881 = 1108^2 + 34641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201226545 - 2¹³ = 1201218353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241192 + ... + 246121.

It is an arithmetic number, because the mean of its divisors is an integer number (98681085).

Almost surely, 2^1201226545 is an apocalyptic number.

It is an amenable number.

1201226545 is a deficient number, since it is larger than the sum of its proper divisors (377670815).

1201226545 is a wasteful number, since it uses less digits than its factorization.

1201226545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487364.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1201226545 is about 34658.7152820182. The cubic root of 1201226545 is about 1063.0205010520.

Adding to 1201226545 its reverse (5456221021), we get a palindrome (6657447566).

The spelling of 1201226545 in words is "one billion, two hundred one million, two hundred twenty-six thousand, five hundred forty-five".