247000123145 has 8 divisors (see below), whose sum is σ = 296405567304. Its totient is φ = 197596485504.

The previous prime is 247000123109. The next prime is 247000123169. The reversal of 247000123145 is 541321000742.

It can be written as a sum of positive squares in 4 ways, for example, as 103392473209 + 143607649936 = 321547^2 + 378956^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 247000123145 - 2²² = 246995928841 is a prime.

It is a super-2 number, since 2×247000123145² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 130004 + ... + 714773.

It is an arithmetic number, because the mean of its divisors is an integer number (37050695913).

Almost surely, 2^247000123145 is an apocalyptic number.

It is an amenable number.

247000123145 is a deficient number, since it is larger than the sum of its proper divisors (49405444159).

247000123145 is an equidigital number, since it uses as much as digits as its factorization.

247000123145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903259.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 247000123145 its reverse (541321000742), we get a palindrome (788321123887).

The spelling of 247000123145 in words is "two hundred forty-seven billion, one hundred twenty-three thousand, one hundred forty-five".