61445321 has 8 divisors (see below), whose sum is σ = 70309824. Its totient is φ = 52602480.

The previous prime is 61445303. The next prime is 61445339. The reversal of 61445321 is 12354416.

61445321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61445303) and next prime (61445339).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61445321 - 2¹⁰ = 61444297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61445381) 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 7 ways as a sum of consecutive naturals, for example, 1211 + ... + 11151.

It is an arithmetic number, because the mean of its divisors is an integer number (8788728).

Almost surely, 2^61445321 is an apocalyptic number.

It is an amenable number.

61445321 is a deficient number, since it is larger than the sum of its proper divisors (8864503).

61445321 is an equidigital number, since it uses as much as digits as its factorization.

61445321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831.

The product of its digits is 2880, while the sum is 26.

The square root of 61445321 is about 7838.7065897379. The cubic root of 61445321 is about 394.6053228092.

Adding to 61445321 its reverse (12354416), we get a palindrome (73799737).

The spelling of 61445321 in words is "sixty-one million, four hundred forty-five thousand, three hundred twenty-one".