104542421 has 4 divisors (see below), whose sum is σ = 104589312. Its totient is φ = 104495532.

The previous prime is 104542391. The next prime is 104542433. The reversal of 104542421 is 124245401.

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 104542421 - 2⁶ = 104542357 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 (104542021) 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, 19925 + ... + 24618.

It is an arithmetic number, because the mean of its divisors is an integer number (26147328).

Almost surely, 2^104542421 is an apocalyptic number.

It is an amenable number.

104542421 is a deficient number, since it is larger than the sum of its proper divisors (46891).

104542421 is an equidigital number, since it uses as much as digits as its factorization.

104542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46890.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 104542421 is about 10224.5988185356. The cubic root of 104542421 is about 471.0830929111.

Adding to 104542421 its reverse (124245401), we get a palindrome (228787822).

The spelling of 104542421 in words is "one hundred four million, five hundred forty-two thousand, four hundred twenty-one".