139535445 has 16 divisors (see below), whose sum is σ = 255150720. Its totient is φ = 63787584.

The previous prime is 139535441. The next prime is 139535447. The reversal of 139535445 is 544535931.

It is not a de Polignac number, because 139535445 - 2² = 139535441 is a prime.

It is a super-2 number, since 2×139535445² = 38940280822696050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139535441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664350 + ... + 664559.

It is an arithmetic number, because the mean of its divisors is an integer number (15946920).

Almost surely, 2^139535445 is an apocalyptic number.

139535445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139535445 is a deficient number, since it is larger than the sum of its proper divisors (115615275).

139535445 is a wasteful number, since it uses less digits than its factorization.

139535445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328924.

The product of its digits is 162000, while the sum is 39.

The square root of 139535445 is about 11812.5122222159. The cubic root of 139535445 is about 518.6744406327.

The spelling of 139535445 in words is "one hundred thirty-nine million, five hundred thirty-five thousand, four hundred forty-five".