61004321 has 4 divisors (see below), whose sum is σ = 69719232. Its totient is φ = 52289412.

The previous prime is 61004309. The next prime is 61004327. The reversal of 61004321 is 12340016.

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 not a de Polignac number, because 61004321 - 2¹⁸ = 60742177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61004321.

It is not an unprimeable number, because it can be changed into a prime (61004327) 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, 4357445 + ... + 4357458.

It is an arithmetic number, because the mean of its divisors is an integer number (17429808).

Almost surely, 2^61004321 is an apocalyptic number.

It is an amenable number.

61004321 is a deficient number, since it is larger than the sum of its proper divisors (8714911).

61004321 is an equidigital number, since it uses as much as digits as its factorization.

61004321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8714910.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 61004321 is about 7810.5262946872. The cubic root of 61004321 is about 393.6590129565.

Adding to 61004321 its reverse (12340016), we get a palindrome (73344337).

The spelling of 61004321 in words is "sixty-one million, four thousand, three hundred twenty-one".