139221305 has 8 divisors (see below), whose sum is σ = 169180800. Its totient is φ = 109966896.

The previous prime is 139221263. The next prime is 139221331. The reversal of 139221305 is 503122931.

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

It is a cyclic number.

It is not a de Polignac number, because 139221305 - 2¹⁴ = 139204921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175835 + ... + 176624.

It is an arithmetic number, because the mean of its divisors is an integer number (21147600).

Almost surely, 2^139221305 is an apocalyptic number.

It is an amenable number.

139221305 is a deficient number, since it is larger than the sum of its proper divisors (29959495).

139221305 is an equidigital number, since it uses as much as digits as its factorization.

139221305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352543.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 139221305 is about 11799.2078123915. The cubic root of 139221305 is about 518.2849128050.

The spelling of 139221305 in words is "one hundred thirty-nine million, two hundred twenty-one thousand, three hundred five".