1205241253 has 4 divisors (see below), whose sum is σ = 1227981708. Its totient is φ = 1182500800.

The previous prime is 1205241227. The next prime is 1205241313. The reversal of 1205241253 is 3521425021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 720492964 + 484748289 = 26842^2 + 22017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205241253 - 2⁵ = 1205241221 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 (1205241223) 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, 11370148 + ... + 11370253.

It is an arithmetic number, because the mean of its divisors is an integer number (306995427).

Almost surely, 2^1205241253 is an apocalyptic number.

It is an amenable number.

1205241253 is a deficient number, since it is larger than the sum of its proper divisors (22740455).

1205241253 is an equidigital number, since it uses as much as digits as its factorization.

1205241253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22740454.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1205241253 is about 34716.5846966547. The cubic root of 1205241253 is about 1064.2034506107.

Adding to 1205241253 its reverse (3521425021), we get a palindrome (4726666274).

It can be divided in two parts, 12052412 and 53, that multiplied together give a palindrome (638777836).

The spelling of 1205241253 in words is "one billion, two hundred five million, two hundred forty-one thousand, two hundred fifty-three".