1253805253 has 4 divisors (see below), whose sum is σ = 1254274560. Its totient is φ = 1253335948.

The previous prime is 1253805251. The next prime is 1253805257. The reversal of 1253805253 is 3525083521.

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 1253805253 - 2¹ = 1253805251 is a prime.

It is a super-2 number, since 2×1253805253² = 3144055224900788018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253805251) 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, 230623 + ... + 235996.

It is an arithmetic number, because the mean of its divisors is an integer number (313568640).

Almost surely, 2^1253805253 is an apocalyptic number.

It is an amenable number.

1253805253 is a deficient number, since it is larger than the sum of its proper divisors (469307).

1253805253 is an equidigital number, since it uses as much as digits as its factorization.

1253805253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469306.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1253805253 is about 35409.1125700716. The cubic root of 1253805253 is about 1078.3093269021.

Adding to 1253805253 its reverse (3525083521), we get a palindrome (4778888774).

The spelling of 1253805253 in words is "one billion, two hundred fifty-three million, eight hundred five thousand, two hundred fifty-three".