1421788051 has 2 divisors, whose sum is σ = 1421788052. Its totient is φ = 1421788050.

The previous prime is 1421788019. The next prime is 1421788063. The reversal of 1421788051 is 1508871241.

It is a strong prime.

It is an emirp because it is prime and its reverse (1508871241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421788051 - 2⁵ = 1421788019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421788051.

It is not a weakly prime, because it can be changed into another prime (1421788451) 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, 710894025 + 710894026.

It is an arithmetic number, because the mean of its divisors is an integer number (710894026).

Almost surely, 2^1421788051 is an apocalyptic number.

1421788051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421788051 is an equidigital number, since it uses as much as digits as its factorization.

1421788051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 1421788051 is about 37706.6048723562. The cubic root of 1421788051 is about 1124.4624397374.

The spelling of 1421788051 in words is "one billion, four hundred twenty-one million, seven hundred eighty-eight thousand, fifty-one".