247406 has 8 divisors (see below), whose sum is σ = 375024. Its totient is φ = 122400.

The previous prime is 247393. The next prime is 247409. The reversal of 247406 is 604742.

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

It is a super-2 number, since 2×247406² = 122419457672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247409) 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 3 ways as a sum of consecutive naturals, for example, 395 + ... + 806.

It is an arithmetic number, because the mean of its divisors is an integer number (46878).

2²⁴⁷⁴⁰⁶ is an apocalyptic number.

247406 is a deficient number, since it is larger than the sum of its proper divisors (127618).

247406 is a wasteful number, since it uses less digits than its factorization.

247406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 247406 is about 497.3992360268. The cubic root of 247406 is about 62.7774121912. Note that the first 3 decimals are identical.

The spelling of 247406 in words is "two hundred forty-seven thousand, four hundred six".