1421604684 has 72 divisors (see below), whose sum is σ = 3652900160. Its totient is φ = 466083072.

The previous prime is 1421604673. The next prime is 1421604689. The reversal of 1421604684 is 4864061241.

It is a happy number.

1421604684 is a `hidden beast` number, since 1 + 42 + 1 + 604 + 6 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1421604689) 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 23 ways as a sum of consecutive naturals, for example, 889374 + ... + 890970.

Almost surely, 2^1421604684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421604684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826450080).

1421604684 is an abundant number, since it is smaller than the sum of its proper divisors (2231295476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421604684 is a wasteful number, since it uses less digits than its factorization.

1421604684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1994 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1421604684 is about 37704.1732968646. The cubic root of 1421604684 is about 1124.4140972838.

The spelling of 1421604684 in words is "one billion, four hundred twenty-one million, six hundred four thousand, six hundred eighty-four".