1621132104 has 64 divisors (see below), whose sum is σ = 4429693440. Its totient is φ = 492180480.

The previous prime is 1621132081. The next prime is 1621132127. The reversal of 1621132104 is 4012311261.

It is an interprime number because it is at equal distance from previous prime (1621132081) and next prime (1621132127).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51439 + ... + 76734.

It is an arithmetic number, because the mean of its divisors is an integer number (69213960).

Almost surely, 2^1621132104 is an apocalyptic number.

It is an amenable number.

1621132104 is an abundant number, since it is smaller than the sum of its proper divisors (2808561336).

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

1621132104 is a wasteful number, since it uses less digits than its factorization.

1621132104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128230 (or 128226 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1621132104 is about 40263.2848138350. The cubic root of 1621132104 is about 1174.7338111966.

Adding to 1621132104 its reverse (4012311261), we get a palindrome (5633443365).

The spelling of 1621132104 in words is "one billion, six hundred twenty-one million, one hundred thirty-two thousand, one hundred four".