61004421 has 48 divisors (see below), whose sum is σ = 98047040. Its totient is φ = 37791360.

The previous prime is 61004369. The next prime is 61004467. The reversal of 61004421 is 12440016.

61004421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61004421 - 2⁹ = 61003909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61004394 and 61004403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61004491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 336951 + ... + 337131.

Almost surely, 2^61004421 is an apocalyptic number.

It is an amenable number.

61004421 is a deficient number, since it is larger than the sum of its proper divisors (37042619).

61004421 is a wasteful number, since it uses less digits than its factorization.

61004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 61004421 is about 7810.5326963018. The cubic root of 61004421 is about 393.6592280554.

Adding to 61004421 its reverse (12440016), we get a palindrome (73444437).

It can be divided in two parts, 61004 and 421, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 61004421 in words is "sixty-one million, four thousand, four hundred twenty-one".