139712401 has 4 divisors (see below), whose sum is σ = 144530100. Its totient is φ = 134894704.

The previous prime is 139712317. The next prime is 139712411. The reversal of 139712401 is 104217931.

139712401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 11820²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73273600 + 66438801 = 8560^2 + 8151^2 .

It is a cyclic number.

It is not a de Polignac number, because 139712401 - 2¹¹ = 139710353 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 139712401.

It is not an unprimeable number, because it can be changed into a prime (139712411) 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, 2408806 + ... + 2408863.

It is an arithmetic number, because the mean of its divisors is an integer number (36132525).

Almost surely, 2^139712401 is an apocalyptic number.

It is an amenable number.

139712401 is a deficient number, since it is larger than the sum of its proper divisors (4817699).

139712401 is an equidigital number, since it uses as much as digits as its factorization.

139712401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817698.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 139712401 is about 11820.0000423012. Note that the first 4 decimals coincide. The cubic root of 139712401 is about 518.8936054542.

The spelling of 139712401 in words is "one hundred thirty-nine million, seven hundred twelve thousand, four hundred one".