1421394005 has 8 divisors (see below), whose sum is σ = 1716537912. Its totient is φ = 1129871808.

The previous prime is 1421393893. The next prime is 1421394017. The reversal of 1421394005 is 5004931241.

It can be written as a sum of positive squares in 4 ways, for example, as 328298161 + 1093095844 = 18119^2 + 33062^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421394005 - 2¹⁰ = 1421392981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904562 + ... + 906131.

It is an arithmetic number, because the mean of its divisors is an integer number (214567239).

Almost surely, 2^1421394005 is an apocalyptic number.

It is an amenable number.

1421394005 is a deficient number, since it is larger than the sum of its proper divisors (295143907).

1421394005 is a wasteful number, since it uses less digits than its factorization.

1421394005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810855.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1421394005 is about 37701.3793514243. The cubic root of 1421394005 is about 1124.3585492252.

The spelling of 1421394005 in words is "one billion, four hundred twenty-one million, three hundred ninety-four thousand, five".