1253430433 has 4 divisors (see below), whose sum is σ = 1259993088. Its totient is φ = 1246867780.

The previous prime is 1253430419. The next prime is 1253430473. The reversal of 1253430433 is 3340343521.

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 a de Polignac number, because none of the positive numbers 2^k-1253430433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253430413) 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, 3281041 + ... + 3281422.

It is an arithmetic number, because the mean of its divisors is an integer number (314998272).

Almost surely, 2^1253430433 is an apocalyptic number.

It is an amenable number.

1253430433 is a deficient number, since it is larger than the sum of its proper divisors (6562655).

1253430433 is an equidigital number, since it uses as much as digits as its factorization.

1253430433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6562654.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 1253430433 is about 35403.8194690912. The cubic root of 1253430433 is about 1078.2018641249.

Adding to 1253430433 its reverse (3340343521), we get a palindrome (4593773954).

The spelling of 1253430433 in words is "one billion, two hundred fifty-three million, four hundred thirty thousand, four hundred thirty-three".