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124481 = 717783
BaseRepresentation
bin11110011001000001
320022202102
4132121001
512440411
62400145
71025630
oct363101
9208672
10124481
1185585
1260055
1344876
1433517
1526d3b
hex1e641

124481 has 4 divisors (see below), whose sum is σ = 142272. Its totient is φ = 106692.

The previous prime is 124477. The next prime is 124489. The reversal of 124481 is 184421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184421 = 223827.

It is a cyclic number.

It is not a de Polignac number, because 124481 - 22 = 124477 is a prime.

It is a super-4 number, since 4×1244814 (a number of 21 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 124481.

It is not an unprimeable number, because it can be changed into a prime (124489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8885 + ... + 8898.

It is an arithmetic number, because the mean of its divisors is an integer number (35568).

2124481 is an apocalyptic number.

It is an amenable number.

124481 is a deficient number, since it is larger than the sum of its proper divisors (17791).

124481 is an equidigital number, since it uses as much as digits as its factorization.

124481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17790.

The product of its digits is 256, while the sum is 20.

The square root of 124481 is about 352.8186503007. The cubic root of 124481 is about 49.9307040057.

The spelling of 124481 in words is "one hundred twenty-four thousand, four hundred eighty-one".

Divisors: 1 7 17783 124481