1421645563 has 8 divisors (see below), whose sum is σ = 1532696256. Its totient is φ = 1310836800.

The previous prime is 1421645557. The next prime is 1421645573. The reversal of 1421645563 is 3655461241.

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

It is not a de Polignac number, because 1421645563 - 2¹⁷ = 1421514491 is a prime.

It is a super-2 number, since 2×1421645563² = 4042152213595173938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421645513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48178 + ... + 71863.

It is an arithmetic number, because the mean of its divisors is an integer number (191587032).

Almost surely, 2^1421645563 is an apocalyptic number.

1421645563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1421645563 is a deficient number, since it is larger than the sum of its proper divisors (111050693).

1421645563 is a wasteful number, since it uses less digits than its factorization.

1421645563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120965.

The product of its digits is 86400, while the sum is 37.

The square root of 1421645563 is about 37704.7153947620. The cubic root of 1421645563 is about 1124.4248748893.

The spelling of 1421645563 in words is "one billion, four hundred twenty-one million, six hundred forty-five thousand, five hundred sixty-three".