139237056 has 168 divisors, whose sum is σ = 473374720. Its totient is φ = 39750912.

The previous prime is 139237013. The next prime is 139237057. The reversal of 139237056 is 650732931.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 139237056.

It is not an unprimeable number, because it can be changed into a prime (139237057) 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, 108225 + ... + 109503.

Almost surely, 2^139237056 is an apocalyptic number.

139237056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139237056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236687360).

139237056 is an abundant number, since it is smaller than the sum of its proper divisors (334137664).

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

139237056 is an equidigital number, since it uses as much as digits as its factorization.

139237056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 139237056 is about 11799.8752535779. The cubic root of 139237056 is about 518.3044577011.

Adding to 139237056 its reverse (650732931), we get a palindrome (789969987).

The spelling of 139237056 in words is "one hundred thirty-nine million, two hundred thirty-seven thousand, fifty-six".