139659212 has 72 divisors (see below), whose sum is σ = 312637248. Its totient is φ = 53978400.

The previous prime is 139659211. The next prime is 139659251. The reversal of 139659212 is 212956931.

It is not an unprimeable number, because it can be changed into a prime (139659211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454763 + ... + 455069.

It is an arithmetic number, because the mean of its divisors is an integer number (4342184).

Almost surely, 2^139659212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139659212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156318624).

139659212 is an abundant number, since it is smaller than the sum of its proper divisors (172978036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139659212 is a wasteful number, since it uses less digits than its factorization.

139659212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 538 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 139659212 is about 11817.7498704280. The cubic root of 139659212 is about 518.8277488924.

The spelling of 139659212 in words is "one hundred thirty-nine million, six hundred fifty-nine thousand, two hundred twelve".