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5124221 = 41124981
BaseRepresentation
bin10011100011000001111101
3100122100002222
4103203001331
52302433341
6301455125
761361264
oct23430175
910570088
105124221
11298a9a3
1218714a5
1310a54ab
149755db
156b344b
hex4e307d

5124221 has 4 divisors (see below), whose sum is σ = 5249244. Its totient is φ = 4999200.

The previous prime is 5124187. The next prime is 5124247. The reversal of 5124221 is 1224215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224215 = 5244843.

It can be written as a sum of positive squares in 2 ways, for example, as 151321 + 4972900 = 389^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 5124221 - 210 = 5123197 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5124221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5124121) 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, 62450 + ... + 62531.

It is an arithmetic number, because the mean of its divisors is an integer number (1312311).

Almost surely, 25124221 is an apocalyptic number.

It is an amenable number.

5124221 is a deficient number, since it is larger than the sum of its proper divisors (125023).

5124221 is a wasteful number, since it uses less digits than its factorization.

5124221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125022.

The product of its digits is 160, while the sum is 17.

The square root of 5124221 is about 2263.6742256782. The cubic root of 5124221 is about 172.4021260928.

Adding to 5124221 its reverse (1224215), we get a palindrome (6348436).

The spelling of 5124221 in words is "five million, one hundred twenty-four thousand, two hundred twenty-one".

Divisors: 1 41 124981 5124221