1621443134 has 8 divisors (see below), whose sum is σ = 2448272208. Its totient is φ = 805352400.

The previous prime is 1621443079. The next prime is 1621443179. The reversal of 1621443134 is 4313441261.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1621443097 and 1621443106.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2684207 + ... + 2684810.

It is an arithmetic number, because the mean of its divisors is an integer number (306034026).

Almost surely, 2^1621443134 is an apocalyptic number.

1621443134 is a deficient number, since it is larger than the sum of its proper divisors (826829074).

1621443134 is a wasteful number, since it uses less digits than its factorization.

1621443134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369170.

The product of its digits is 6912, while the sum is 29.

The square root of 1621443134 is about 40267.1470804675. The cubic root of 1621443134 is about 1174.8089344375.

Adding to 1621443134 its reverse (4313441261), we get a palindrome (5934884395).

The spelling of 1621443134 in words is "one billion, six hundred twenty-one million, four hundred forty-three thousand, one hundred thirty-four".