1205540053 has 2 divisors, whose sum is σ = 1205540054. Its totient is φ = 1205540052.

The previous prime is 1205540047. The next prime is 1205540087. The reversal of 1205540053 is 3500455021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085900209 + 119639844 = 32953^2 + 10938^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205540053 - 2²¹ = 1203442901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205540033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602770026 + 602770027.

It is an arithmetic number, because the mean of its divisors is an integer number (602770027).

Almost surely, 2^1205540053 is an apocalyptic number.

It is an amenable number.

1205540053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205540053 is an equidigital number, since it uses as much as digits as its factorization.

1205540053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1205540053 is about 34720.8878486712. The cubic root of 1205540053 is about 1064.2913881131.

Adding to 1205540053 its reverse (3500455021), we get a palindrome (4705995074).

The spelling of 1205540053 in words is "one billion, two hundred five million, five hundred forty thousand, fifty-three".