247641 has 16 divisors (see below), whose sum is σ = 357504. Its totient is φ = 152064.

The previous prime is 247633. The next prime is 247649. The reversal of 247641 is 146742.

It is an interprime number because it is at equal distance from previous prime (247633) and next prime (247649).

It is not a de Polignac number, because 247641 - 2³ = 247633 is a prime.

It is a super-2 number, since 2×247641² = 122652129762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2505 + ... + 2601.

It is an arithmetic number, because the mean of its divisors is an integer number (22344).

2²⁴⁷⁶⁴¹ is an apocalyptic number.

It is an amenable number.

247641 is a deficient number, since it is larger than the sum of its proper divisors (109863).

247641 is a wasteful number, since it uses less digits than its factorization.

247641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160.

The product of its digits is 1344, while the sum is 24.

The square root of 247641 is about 497.6354087080. The cubic root of 247641 is about 62.7972823956.

It can be divided in two parts, 247 and 641, that added together give a palindrome (888).

The spelling of 247641 in words is "two hundred forty-seven thousand, six hundred forty-one".