253247417 has 8 divisors (see below), whose sum is σ = 258832392. Its totient is φ = 247708800.

The previous prime is 253247413. The next prime is 253247429. The reversal of 253247417 is 714742352.

It can be written as a sum of positive squares in 4 ways, for example, as 35271721 + 217975696 = 5939^2 + 14764^2 .

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

It is not a de Polignac number, because 253247417 - 2² = 253247413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253247413) 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 7 ways as a sum of consecutive naturals, for example, 428 + ... + 22509.

It is an arithmetic number, because the mean of its divisors is an integer number (32354049).

Almost surely, 2^253247417 is an apocalyptic number.

It is an amenable number.

253247417 is a deficient number, since it is larger than the sum of its proper divisors (5584975).

253247417 is a wasteful number, since it uses less digits than its factorization.

253247417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23179.

The product of its digits is 47040, while the sum is 35.

The square root of 253247417 is about 15913.7493068101. The cubic root of 253247417 is about 632.6764583406.

Adding to 253247417 its reverse (714742352), we get a palindrome (967989769).

The spelling of 253247417 in words is "two hundred fifty-three million, two hundred forty-seven thousand, four hundred seventeen".