139540545 has 24 divisors (see below), whose sum is σ = 243726912. Its totient is φ = 73850400.

The previous prime is 139540483. The next prime is 139540549. The reversal of 139540545 is 545045931.

It is not a de Polignac number, because 139540545 - 2⁹ = 139540033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139540549) 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, 5941 + ... + 17730.

It is an arithmetic number, because the mean of its divisors is an integer number (10155288).

Almost surely, 2^139540545 is an apocalyptic number.

139540545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139540545 is a deficient number, since it is larger than the sum of its proper divisors (104186367).

139540545 is a wasteful number, since it uses less digits than its factorization.

139540545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23813 (or 23810 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 139540545 is about 11812.7280930359. The cubic root of 139540545 is about 518.6807597139.

The spelling of 139540545 in words is "one hundred thirty-nine million, five hundred forty thousand, five hundred forty-five".