1421002104257 has 2 divisors, whose sum is σ = 1421002104258. Its totient is φ = 1421002104256.

The previous prime is 1421002104239. The next prime is 1421002104281. The reversal of 1421002104257 is 7524012001241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931773200656 + 489228903601 = 965284^2 + 699449^2 .

It is an emirp because it is prime and its reverse (7524012001241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421002104257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421002106257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710501052128 + 710501052129.

It is an arithmetic number, because the mean of its divisors is an integer number (710501052129).

Almost surely, 2^{1421002104257} is an apocalyptic number.

It is an amenable number.

1421002104257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421002104257 is an equidigital number, since it uses as much as digits as its factorization.

1421002104257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 1421002104257 its reverse (7524012001241), we get a palindrome (8945014105498).

The spelling of 1421002104257 in words is "one trillion, four hundred twenty-one billion, two million, one hundred four thousand, two hundred fifty-seven".