1205526541 has 4 divisors (see below), whose sum is σ = 1213205212. Its totient is φ = 1197847872.

The previous prime is 1205526529. The next prime is 1205526551. The reversal of 1205526541 is 1456255021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1456255021 = 13 ⋅112019617.

It can be written as a sum of positive squares in 2 ways, for example, as 658948900 + 546577641 = 25670^2 + 23379^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205526541 - 2¹¹ = 1205524493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205526551) 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, 3839100 + ... + 3839413.

It is an arithmetic number, because the mean of its divisors is an integer number (303301303).

Almost surely, 2^1205526541 is an apocalyptic number.

It is an amenable number.

1205526541 is a deficient number, since it is larger than the sum of its proper divisors (7678671).

1205526541 is an equidigital number, since it uses as much as digits as its factorization.

1205526541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7678670.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1205526541 is about 34720.6932678482. The cubic root of 1205526541 is about 1064.2874118153.

The spelling of 1205526541 in words is "one billion, two hundred five million, five hundred twenty-six thousand, five hundred forty-one".