139224605 has 8 divisors (see below), whose sum is σ = 179921112. Its totient is φ = 102811968.

The previous prime is 139224551. The next prime is 139224607. The reversal of 139224605 is 506422931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27478564 + 111746041 = 5242^2 + 10571^2 .

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 139224605 - 2¹⁴ = 139208221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139224607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070894 + ... + 1071023.

It is an arithmetic number, because the mean of its divisors is an integer number (22490139).

Almost surely, 2^139224605 is an apocalyptic number.

It is an amenable number.

139224605 is a deficient number, since it is larger than the sum of its proper divisors (40696507).

139224605 is a wasteful number, since it uses less digits than its factorization.

139224605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141935.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 139224605 is about 11799.3476514594. The cubic root of 139224605 is about 518.2890077881.

The spelling of 139224605 in words is "one hundred thirty-nine million, two hundred twenty-four thousand, six hundred five".