1103451621 has 4 divisors (see below), whose sum is σ = 1471268832. Its totient is φ = 735634412.

The previous prime is 1103451607. The next prime is 1103451647. The reversal of 1103451621 is 1261543011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1103451621 - 2⁷ = 1103451493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1103451591 and 1103451600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103451221) 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, 183908601 + ... + 183908606.

It is an arithmetic number, because the mean of its divisors is an integer number (367817208).

Almost surely, 2^1103451621 is an apocalyptic number.

It is an amenable number.

1103451621 is a deficient number, since it is larger than the sum of its proper divisors (367817211).

1103451621 is an equidigital number, since it uses as much as digits as its factorization.

1103451621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367817210.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1103451621 is about 33218.2422924513. The cubic root of 1103451621 is about 1033.3586971113.

Adding to 1103451621 its reverse (1261543011), we get a palindrome (2364994632).

The spelling of 1103451621 in words is "one billion, one hundred three million, four hundred fifty-one thousand, six hundred twenty-one".