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247417 = 401617
BaseRepresentation
bin111100011001111001
3110120101121
4330121321
530404132
65145241
72050222
oct743171
9416347
10247417
11159985
12bb221
1388801
1466249
154d497
hex3c679

247417 has 4 divisors (see below), whose sum is σ = 248436. Its totient is φ = 246400.

The previous prime is 247409. The next prime is 247421. The reversal of 247417 is 714742.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 114921 = 364^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 247417 - 23 = 247409 is a prime.

It is a super-2 number, since 2×2474172 = 122430343778, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 247391 and 247400.

It is not an unprimeable number, because it can be changed into a prime (247717) 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, 93 + ... + 709.

It is an arithmetic number, because the mean of its divisors is an integer number (62109).

2247417 is an apocalyptic number.

It is an amenable number.

247417 is a deficient number, since it is larger than the sum of its proper divisors (1019).

247417 is an equidigital number, since it uses as much as digits as its factorization.

247417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its digits is 1568, while the sum is 25.

The square root of 247417 is about 497.4102934198. The cubic root of 247417 is about 62.7783425665.

The spelling of 247417 in words is "two hundred forty-seven thousand, four hundred seventeen", and thus it is an iban number.

Divisors: 1 401 617 247417