1621041103 has 16 divisors (see below), whose sum is σ = 1873704960. Its totient is φ = 1386044800.

The previous prime is 1621041091. The next prime is 1621041113. The reversal of 1621041103 is 3011401261.

It is a cyclic number.

It is not a de Polignac number, because 1621041103 - 2⁹ = 1621040591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621041113) 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 15 ways as a sum of consecutive naturals, for example, 536868 + ... + 539878.

It is an arithmetic number, because the mean of its divisors is an integer number (117106560).

Almost surely, 2^1621041103 is an apocalyptic number.

1621041103 is a deficient number, since it is larger than the sum of its proper divisors (252663857).

1621041103 is a wasteful number, since it uses less digits than its factorization.

1621041103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5918.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1621041103 is about 40262.1547237601. The cubic root of 1621041103 is about 1174.7118298599.

Adding to 1621041103 its reverse (3011401261), we get a palindrome (4632442364).

The spelling of 1621041103 in words is "one billion, six hundred twenty-one million, forty-one thousand, one hundred three".