139285405 has 32 divisors (see below), whose sum is σ = 202487040. Its totient is φ = 89940480.

The previous prime is 139285397. The next prime is 139285411. The reversal of 139285405 is 504582931.

139285405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139285405 - 2³ = 139285397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39942 + ... + 43288.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^139285405 is an apocalyptic number.

It is an amenable number.

139285405 is a deficient number, since it is larger than the sum of its proper divisors (63201635).

139285405 is a wasteful number, since it uses less digits than its factorization.

139285405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 139285405 is about 11801.9237838583. The cubic root of 139285405 is about 518.3644431746.

The spelling of 139285405 in words is "one hundred thirty-nine million, two hundred eighty-five thousand, four hundred five".