1205210545 has 16 divisors (see below), whose sum is σ = 1803120768. Its totient is φ = 751299840.

The previous prime is 1205210483. The next prime is 1205210549. The reversal of 1205210545 is 5450125021.

It is not a de Polignac number, because 1205210545 - 2¹¹ = 1205208497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205210549) 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, 1564824 + ... + 1565593.

It is an arithmetic number, because the mean of its divisors is an integer number (112695048).

Almost surely, 2^1205210545 is an apocalyptic number.

It is an amenable number.

1205210545 is a deficient number, since it is larger than the sum of its proper divisors (597910223).

1205210545 is a wasteful number, since it uses less digits than its factorization.

1205210545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130440.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1205210545 is about 34716.1424268308. The cubic root of 1205210545 is about 1064.1944123547.

Adding to 1205210545 its reverse (5450125021), we get a palindrome (6655335566).

The spelling of 1205210545 in words is "one billion, two hundred five million, two hundred ten thousand, five hundred forty-five".