1420121887 has 2 divisors, whose sum is σ = 1420121888. Its totient is φ = 1420121886.

The previous prime is 1420121839. The next prime is 1420121891. The reversal of 1420121887 is 7881210241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420121887 is a prime.

It is a super-3 number, since 3×1420121887³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420122887) 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, 710060943 + 710060944.

It is an arithmetic number, because the mean of its divisors is an integer number (710060944).

Almost surely, 2^1420121887 is an apocalyptic number.

1420121887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420121887 is an equidigital number, since it uses as much as digits as its factorization.

1420121887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 1420121887 is about 37684.5046006976. The cubic root of 1420121887 is about 1124.0230232891.

The spelling of 1420121887 in words is "one billion, four hundred twenty million, one hundred twenty-one thousand, eight hundred eighty-seven".