253794421 has 4 divisors (see below), whose sum is σ = 255109612. Its totient is φ = 252479232.

The previous prime is 253794413. The next prime is 253794491. The reversal of 253794421 is 124497352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 181306225 + 72488196 = 13465^2 + 8514^2 .

It is a cyclic number.

It is not a de Polignac number, because 253794421 - 2³ = 253794413 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 (253794491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657306 + ... + 657691.

It is an arithmetic number, because the mean of its divisors is an integer number (63777403).

Almost surely, 2^253794421 is an apocalyptic number.

It is an amenable number.

253794421 is a deficient number, since it is larger than the sum of its proper divisors (1315191).

253794421 is a wasteful number, since it uses less digits than its factorization.

253794421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315190.

The product of its digits is 60480, while the sum is 37.

The square root of 253794421 is about 15930.9265581133. The cubic root of 253794421 is about 633.1316491387.

The spelling of 253794421 in words is "two hundred fifty-three million, seven hundred ninety-four thousand, four hundred twenty-one".