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1268621 is a prime number
BaseRepresentation
bin100110101101110001101
32101110012222
410311232031
5311043441
643105125
713532414
oct4655615
92343188
101268621
11797152
125121a5
13355583
1425047b
151a0d4b
hex135b8d

1268621 has 2 divisors, whose sum is σ = 1268622. Its totient is φ = 1268620.

The previous prime is 1268599. The next prime is 1268623.

1268621 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 546121 = 850^2 + 739^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1268621 is a prime.

Together with 1268623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634310 + 634311.

It is an arithmetic number, because the mean of its divisors is an integer number (634311).

21268621 is an apocalyptic number.

It is an amenable number.

1268621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268621 is an equidigital number, since it uses as much as digits as its factorization.

1268621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 1268621 is about 1126.3307684690. The cubic root of 1268621 is about 108.2540031979.

The spelling of 1268621 in words is "one million, two hundred sixty-eight thousand, six hundred twenty-one".