1421875019 has 16 divisors (see below), whose sum is σ = 1572851520. Its totient is φ = 1278520320.

The previous prime is 1421875009. The next prime is 1421875027. The reversal of 1421875019 is 9105781241.

It is not a de Polignac number, because 1421875019 - 2²⁰ = 1420826443 is a prime.

It is a super-2 number, since 2×1421875019² = 4043457139312500722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421875009) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 439829 + ... + 443049.

It is an arithmetic number, because the mean of its divisors is an integer number (98303220).

Almost surely, 2^1421875019 is an apocalyptic number.

1421875019 is a deficient number, since it is larger than the sum of its proper divisors (150976501).

1421875019 is a wasteful number, since it uses less digits than its factorization.

1421875019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 1421875019 is about 37707.7580744334. The cubic root of 1421875019 is about 1124.4853663276.

The spelling of 1421875019 in words is "one billion, four hundred twenty-one million, eight hundred seventy-five thousand, nineteen".