1421235251477 has 2 divisors, whose sum is σ = 1421235251478. Its totient is φ = 1421235251476.

The previous prime is 1421235251399. The next prime is 1421235251497. The reversal of 1421235251477 is 7741525321241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 769209686116 + 652025565361 = 877046^2 + 807481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421235251477 - 2¹⁴ = 1421235235093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421235251497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710617625738 + 710617625739.

It is an arithmetic number, because the mean of its divisors is an integer number (710617625739).

Almost surely, 2^{1421235251477} is an apocalyptic number.

It is an amenable number.

1421235251477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421235251477 is an equidigital number, since it uses as much as digits as its factorization.

1421235251477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 44.

The spelling of 1421235251477 in words is "one trillion, four hundred twenty-one billion, two hundred thirty-five million, two hundred fifty-one thousand, four hundred seventy-seven".