253605043 has 4 divisors (see below), whose sum is σ = 253782720. Its totient is φ = 253427368.

The previous prime is 253605019. The next prime is 253605047. The reversal of 253605043 is 340506352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253605043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253605047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86680 + ... + 89557.

It is an arithmetic number, because the mean of its divisors is an integer number (63445680).

Almost surely, 2^253605043 is an apocalyptic number.

253605043 is a deficient number, since it is larger than the sum of its proper divisors (177677).

253605043 is a wasteful number, since it uses less digits than its factorization.

253605043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177676.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 253605043 is about 15924.9817268341. The cubic root of 253605043 is about 632.9741318323.

It can be divided in two parts, 25360 and 5043, that added together give a palindrome (30403).

The spelling of 253605043 in words is "two hundred fifty-three million, six hundred five thousand, forty-three".