1205355253 has 4 divisors (see below), whose sum is σ = 1237932460. Its totient is φ = 1172778048.

The previous prime is 1205355209. The next prime is 1205355287. The reversal of 1205355253 is 3525535021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3525535021 = 17 ⋅207384413.

It can be written as a sum of positive squares in 2 ways, for example, as 967023409 + 238331844 = 31097^2 + 15438^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1205355253 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 (1205355653) 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, 16288548 + ... + 16288621.

It is an arithmetic number, because the mean of its divisors is an integer number (309483115).

Almost surely, 2^1205355253 is an apocalyptic number.

It is an amenable number.

1205355253 is a deficient number, since it is larger than the sum of its proper divisors (32577207).

1205355253 is an equidigital number, since it uses as much as digits as its factorization.

1205355253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32577206.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 1205355253 is about 34718.2265244065. The cubic root of 1205355253 is about 1064.2370027780.

The spelling of 1205355253 in words is "one billion, two hundred five million, three hundred fifty-five thousand, two hundred fifty-three".