253720426 has 8 divisors (see below), whose sum is σ = 380648484. Its totient is φ = 126837600.

The previous prime is 253720361. The next prime is 253720451. The reversal of 253720426 is 624027352.

It can be written as a sum of positive squares in 2 ways, for example, as 250114225 + 3606201 = 15815^2 + 1899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14476 + ... + 26776.

Almost surely, 2^253720426 is an apocalyptic number.

253720426 is a deficient number, since it is larger than the sum of its proper divisors (126928058).

253720426 is a wasteful number, since it uses less digits than its factorization.

253720426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22616.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 253720426 is about 15928.6040191851. The cubic root of 253720426 is about 633.0701122855.

Adding to 253720426 its reverse (624027352), we get a palindrome (877747778).

The spelling of 253720426 in words is "two hundred fifty-three million, seven hundred twenty thousand, four hundred twenty-six".