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BaseRepresentation
bin100101000001001…
…0000010111010101
310012120020111011001
41022002100113111
510020434332201
6323130343301
742531502153
oct11202202725
93176214131
101242105301
11588155108
122a7b8ab31
1316a447368
15740a6301
hex4a0905d5

1242105301 has 2 divisors, whose sum is σ = 1242105302. Its totient is φ = 1242105300.

The previous prime is 1242105299. The next prime is 1242105407. The reversal of 1242105301 is 1035012421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1139062500 + 103042801 = 33750^2 + 10151^2 .

It is an emirp because it is prime and its reverse (1035012421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242105301 - 21 = 1242105299 is a prime.

Together with 1242105299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242106301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621052650 + 621052651.

It is an arithmetic number, because the mean of its divisors is an integer number (621052651).

Almost surely, 21242105301 is an apocalyptic number.

It is an amenable number.

1242105301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242105301 is an equidigital number, since it uses as much as digits as its factorization.

1242105301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1242105301 is about 35243.5143111467. The cubic root of 1242105301 is about 1074.9447387493.

Adding to 1242105301 its reverse (1035012421), we get a palindrome (2277117722).

The spelling of 1242105301 in words is "one billion, two hundred forty-two million, one hundred five thousand, three hundred one".