1712400127621 has 2 divisors, whose sum is σ = 1712400127622. Its totient is φ = 1712400127620.

The previous prime is 1712400127591. The next prime is 1712400127661. The reversal of 1712400127621 is 1267210042171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910470922596 + 801929205025 = 954186^2 + 895505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1712400127621 - 2¹³ = 1712400119429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1712400127661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 856200063810 + 856200063811.

It is an arithmetic number, because the mean of its divisors is an integer number (856200063811).

Almost surely, 2^{1712400127621} is an apocalyptic number.

It is an amenable number.

1712400127621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1712400127621 is an equidigital number, since it uses as much as digits as its factorization.

1712400127621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

Adding to 1712400127621 its reverse (1267210042171), we get a palindrome (2979610169792).

The spelling of 1712400127621 in words is "one trillion, seven hundred twelve billion, four hundred million, one hundred twenty-seven thousand, six hundred twenty-one".