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1243013 is a prime number
BaseRepresentation
bin100101111011110000101
32100011002112
410233132011
5304234023
642350405
713364642
oct4573605
92304075
101243013
11779992
124bb405
13346a15
14244dc9
15198478
hex12f785

1243013 has 2 divisors, whose sum is σ = 1243014. Its totient is φ = 1243012.

The previous prime is 1243003. The next prime is 1243093. The reversal of 1243013 is 3103421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 247009 = 998^2 + 497^2 .

It is an emirp because it is prime and its reverse (3103421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1243013 - 28 = 1242757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621506 + 621507.

It is an arithmetic number, because the mean of its divisors is an integer number (621507).

21243013 is an apocalyptic number.

It is an amenable number.

1243013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243013 is an equidigital number, since it uses as much as digits as its factorization.

1243013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1243013 is about 1114.9049286823. The cubic root of 1243013 is about 107.5206522427.

Adding to 1243013 its reverse (3103421), we get a palindrome (4346434).

The spelling of 1243013 in words is "one million, two hundred forty-three thousand, thirteen".