139127540 has 12 divisors (see below), whose sum is σ = 292167876. Its totient is φ = 55651008.

The previous prime is 139127531. The next prime is 139127551. The reversal of 139127540 is 45721931.

139127540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 91738084 + 47389456 = 9578^2 + 6884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139127497 and 139127506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3478169 + ... + 3478208.

It is an arithmetic number, because the mean of its divisors is an integer number (24347323).

Almost surely, 2^139127540 is an apocalyptic number.

139127540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139127540 is an abundant number, since it is smaller than the sum of its proper divisors (153040336).

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

139127540 is a wasteful number, since it uses less digits than its factorization.

139127540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6956386 (or 6956384 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 139127540 is about 11795.2337831855. The cubic root of 139127540 is about 518.1685323920.

The spelling of 139127540 in words is "one hundred thirty-nine million, one hundred twenty-seven thousand, five hundred forty".