1104542021 has 4 divisors (see below), whose sum is σ = 1204954944. Its totient is φ = 1004129100.

The previous prime is 1104542011. The next prime is 1104542039. The reversal of 1104542021 is 1202454011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1202454011 = 11 ⋅109314001.

It is a cyclic number.

It is not a de Polignac number, because 1104542021 - 2¹⁸ = 1104279877 is a prime.

It is a super-4 number, since 4×1104542021⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1104541984 and 1104542002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1104542011) 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, 50206445 + ... + 50206466.

It is an arithmetic number, because the mean of its divisors is an integer number (301238736).

Almost surely, 2^1104542021 is an apocalyptic number.

1104542021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1104542021 is a deficient number, since it is larger than the sum of its proper divisors (100412923).

1104542021 is a wasteful number, since it uses less digits than its factorization.

1104542021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100412922.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1104542021 is about 33234.6509083517. The cubic root of 1104542021 is about 1033.6989637668.

Adding to 1104542021 its reverse (1202454011), we get a palindrome (2306996032).

The spelling of 1104542021 in words is "one billion, one hundred four million, five hundred forty-two thousand, twenty-one".