1205251053 has 4 divisors (see below), whose sum is σ = 1607001408. Its totient is φ = 803500700.

The previous prime is 1205251043. The next prime is 1205251067. The reversal of 1205251053 is 3501525021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1205251053 - 2⁸ = 1205250797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205251013) 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, 200875173 + ... + 200875178.

It is an arithmetic number, because the mean of its divisors is an integer number (401750352).

Almost surely, 2^1205251053 is an apocalyptic number.

It is an amenable number.

1205251053 is a deficient number, since it is larger than the sum of its proper divisors (401750355).

1205251053 is an equidigital number, since it uses as much as digits as its factorization.

1205251053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401750354.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1205251053 is about 34716.7258392839. The cubic root of 1205251053 is about 1064.2063350030.

Adding to 1205251053 its reverse (3501525021), we get a palindrome (4706776074).

The spelling of 1205251053 in words is "one billion, two hundred five million, two hundred fifty-one thousand, fifty-three".