247042005 has 16 divisors (see below), whose sum is σ = 451734144. Its totient is φ = 112933440.

The previous prime is 247041989. The next prime is 247042031. The reversal of 247042005 is 500240742.

It is not a de Polignac number, because 247042005 - 2⁴ = 247041989 is a prime.

It is a super-2 number, since 2×247042005² = 122059504468840050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176286 + ... + 1176495.

It is an arithmetic number, because the mean of its divisors is an integer number (28233384).

Almost surely, 2^247042005 is an apocalyptic number.

It is an amenable number.

247042005 is a deficient number, since it is larger than the sum of its proper divisors (204692139).

247042005 is a wasteful number, since it uses less digits than its factorization.

247042005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352796.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 247042005 is about 15717.5699457645. The cubic root of 247042005 is about 627.4661008232.

Adding to 247042005 its reverse (500240742), we get a palindrome (747282747).

The spelling of 247042005 in words is "two hundred forty-seven million, forty-two thousand, five".