1421644105 has 40 divisors (see below), whose sum is σ = 2016720000. Its totient is φ = 961859808.

The previous prime is 1421644067. The next prime is 1421644129. The reversal of 1421644105 is 5014461241.

It is not a de Polignac number, because 1421644105 - 2¹⁵ = 1421611337 is a prime.

It is a super-2 number, since 2×1421644105² = 4042143922562502050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 947646 + ... + 949144.

It is an arithmetic number, because the mean of its divisors is an integer number (50418000).

Almost surely, 2^1421644105 is an apocalyptic number.

It is an amenable number.

1421644105 is a deficient number, since it is larger than the sum of its proper divisors (595075895).

1421644105 is an frugal number, since it uses more digits than its factorization.

1421644105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1421644105 is about 37704.6960603053. The cubic root of 1421644105 is about 1124.4244904962.

The spelling of 1421644105 in words is "one billion, four hundred twenty-one million, six hundred forty-four thousand, one hundred five".