139292385 has 16 divisors (see below), whose sum is σ = 223077696. Its totient is φ = 74219328.

The previous prime is 139292381. The next prime is 139292399. The reversal of 139292385 is 583292931.

139292385 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 139292385 - 2² = 139292381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139292381) 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, 14802 + ... + 22308.

It is an arithmetic number, because the mean of its divisors is an integer number (13942356).

Almost surely, 2^139292385 is an apocalyptic number.

139292385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139292385 is a deficient number, since it is larger than the sum of its proper divisors (83785311).

139292385 is a wasteful number, since it uses less digits than its factorization.

139292385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752.

The product of its digits is 116640, while the sum is 42.

The square root of 139292385 is about 11802.2194946544. The cubic root of 139292385 is about 518.3731019506.

The spelling of 139292385 in words is "one hundred thirty-nine million, two hundred ninety-two thousand, three hundred eighty-five".