139128262 has 32 divisors (see below), whose sum is σ = 257709312. Its totient is φ = 54856224.

The previous prime is 139128257. The next prime is 139128277. The reversal of 139128262 is 262821931.

139128262 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62053 + ... + 64255.

It is an arithmetic number, because the mean of its divisors is an integer number (8053416).

Almost surely, 2^139128262 is an apocalyptic number.

139128262 is a deficient number, since it is larger than the sum of its proper divisors (118581050).

139128262 is a wasteful number, since it uses less digits than its factorization.

139128262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its digits is 10368, while the sum is 34.

The square root of 139128262 is about 11795.2643887282. The cubic root of 139128262 is about 518.1694287328.

The spelling of 139128262 in words is "one hundred thirty-nine million, one hundred twenty-eight thousand, two hundred sixty-two".