139155900 has 144 divisors (see below), whose sum is σ = 447971328. Its totient is φ = 33120000.

The previous prime is 139155883. The next prime is 139155941. The reversal of 139155900 is 9551931.

139155900 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 (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120325 + ... + 121475.

It is an arithmetic number, because the mean of its divisors is an integer number (3110912).

Almost surely, 2^139155900 is an apocalyptic number.

139155900 is a gapful number since it is divisible by the number (10) 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 139155900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223985664).

139155900 is an abundant number, since it is smaller than the sum of its proper divisors (308815428).

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

139155900 is a wasteful number, since it uses less digits than its factorization.

139155900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 139155900 is about 11796.4359024241. The cubic root of 139155900 is about 518.2037381253.

It can be divided in two parts, 1391 and 55900, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 139155900 in words is "one hundred thirty-nine million, one hundred fifty-five thousand, nine hundred".