139051405 has 16 divisors (see below), whose sum is σ = 175968000. Its totient is φ = 105192000.

The previous prime is 139051403. The next prime is 139051417. The reversal of 139051405 is 504150931.

It is not a de Polignac number, because 139051405 - 2¹ = 139051403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139051403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70371 + ... + 72319.

It is an arithmetic number, because the mean of its divisors is an integer number (10998000).

Almost surely, 2^139051405 is an apocalyptic number.

It is an amenable number.

139051405 is a deficient number, since it is larger than the sum of its proper divisors (36916595).

139051405 is a wasteful number, since it uses less digits than its factorization.

139051405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 139051405 is about 11792.0059786281. The cubic root of 139051405 is about 518.0739957301.

The spelling of 139051405 in words is "one hundred thirty-nine million, fifty-one thousand, four hundred five".