247042 has 8 divisors (see below), whose sum is σ = 373500. Its totient is φ = 122544.

The previous prime is 247031. The next prime is 247067. The reversal of 247042 is 240742.

It can be written as a sum of positive squares in 2 ways, for example, as 239121 + 7921 = 489^2 + 89^2 .

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

It is a super-2 number, since 2×247042² = 122059499528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117 + ... + 712.

2²⁴⁷⁰⁴² is an apocalyptic number.

247042 is a deficient number, since it is larger than the sum of its proper divisors (126458).

247042 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 247042 = (742402)₈.

247042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 247042 is about 497.0331980864. The cubic root of 247042 is about 62.7466096590.

Adding to 247042 its reverse (240742), we get a palindrome (487784).

It can be divided in two parts, 2470 and 42, that multiplied together give a triangular number (103740 = T₄₅₅).

The spelling of 247042 in words is "two hundred forty-seven thousand, forty-two", and thus it is an iban number.