1421395671 has 4 divisors (see below), whose sum is σ = 1895194232. Its totient is φ = 947597112.

The previous prime is 1421395669. The next prime is 1421395673. The reversal of 1421395671 is 1765931241.

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

It is an interprime number because it is at equal distance from previous prime (1421395669) and next prime (1421395673).

It is not a de Polignac number, because 1421395671 - 2¹ = 1421395669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421395673) 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 in 3 ways as a sum of consecutive naturals, for example, 236899276 + ... + 236899281.

It is an arithmetic number, because the mean of its divisors is an integer number (473798558).

Almost surely, 2^1421395671 is an apocalyptic number.

1421395671 is a deficient number, since it is larger than the sum of its proper divisors (473798561).

1421395671 is an equidigital number, since it uses as much as digits as its factorization.

1421395671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473798560.

The product of its digits is 45360, while the sum is 39.

The square root of 1421395671 is about 37701.4014461001. The cubic root of 1421395671 is about 1124.3589885077.

The spelling of 1421395671 in words is "one billion, four hundred twenty-one million, three hundred ninety-five thousand, six hundred seventy-one".