1621235104 has 24 divisors (see below), whose sum is σ = 3204538848. Its totient is φ = 807384000.

The previous prime is 1621235101. The next prime is 1621235129. The reversal of 1621235104 is 4015321261.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1621235101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92892 + ... + 108955.

It is an arithmetic number, because the mean of its divisors is an integer number (133522452).

Almost surely, 2^1621235104 is an apocalyptic number.

It is an amenable number.

1621235104 is a deficient number, since it is larger than the sum of its proper divisors (1583303744).

1621235104 is a wasteful number, since it uses less digits than its factorization.

1621235104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202108 (or 202100 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1621235104 is about 40264.5638744542. The cubic root of 1621235104 is about 1174.7586899053.

Adding to 1621235104 its reverse (4015321261), we get a palindrome (5636556365).

The spelling of 1621235104 in words is "one billion, six hundred twenty-one million, two hundred thirty-five thousand, one hundred four".