1420043434657 has 4 divisors (see below), whose sum is σ = 1420048625796. Its totient is φ = 1420038243520.

The previous prime is 1420043434577. The next prime is 1420043434703. The reversal of 1420043434657 is 7564343400241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 987288653376 + 432754781281 = 993624^2 + 657841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420043434657 - 2¹¹ = 1420043432609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420043434457) 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 in 3 ways as a sum of consecutive naturals, for example, 2160988 + ... + 2740429.

It is an arithmetic number, because the mean of its divisors is an integer number (355012156449).

Almost surely, 2^{1420043434657} is an apocalyptic number.

It is an amenable number.

1420043434657 is a deficient number, since it is larger than the sum of its proper divisors (5191139).

1420043434657 is an equidigital number, since it uses as much as digits as its factorization.

1420043434657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191138.

The product of its (nonzero) digits is 967680, while the sum is 43.

Adding to 1420043434657 its reverse (7564343400241), we get a palindrome (8984386834898).

The spelling of 1420043434657 in words is "one trillion, four hundred twenty billion, forty-three million, four hundred thirty-four thousand, six hundred fifty-seven".