1420238685857 has 2 divisors, whose sum is σ = 1420238685858. Its totient is φ = 1420238685856.

The previous prime is 1420238685829. The next prime is 1420238685869. The reversal of 1420238685857 is 7585868320241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311840366736 + 108398319121 = 1145356^2 + 329239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420238685857 - 2⁶ = 1420238685793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1420238685796 and 1420238685805.

It is not a weakly prime, because it can be changed into another prime (1420238625857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710119342928 + 710119342929.

It is an arithmetic number, because the mean of its divisors is an integer number (710119342929).

Almost surely, 2^{1420238685857} is an apocalyptic number.

It is an amenable number.

1420238685857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420238685857 is an equidigital number, since it uses as much as digits as its factorization.

1420238685857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25804800, while the sum is 59.

The spelling of 1420238685857 in words is "one trillion, four hundred twenty billion, two hundred thirty-eight million, six hundred eighty-five thousand, eight hundred fifty-seven".