1421604665 has 32 divisors (see below), whose sum is σ = 1901018112. Its totient is φ = 1013472000.

The previous prime is 1421604641. The next prime is 1421604673. The reversal of 1421604665 is 5664061241.

It is not a de Polignac number, because 1421604665 - 2¹⁴ = 1421588281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1391855 + ... + 1392875.

It is an arithmetic number, because the mean of its divisors is an integer number (59406816).

Almost surely, 2^1421604665 is an apocalyptic number.

It is an amenable number.

1421604665 is a deficient number, since it is larger than the sum of its proper divisors (479413447).

1421604665 is a wasteful number, since it uses less digits than its factorization.

1421604665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1421604665 is about 37704.1730449031. The cubic root of 1421604665 is about 1124.4140922745.

The spelling of 1421604665 in words is "one billion, four hundred twenty-one million, six hundred four thousand, six hundred sixty-five".