139579142 has 4 divisors (see below), whose sum is σ = 209368716. Its totient is φ = 69789570.

The previous prime is 139579127. The next prime is 139579147. The reversal of 139579142 is 241975931.

139579142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241975931 = 761 ⋅317971.

It is a self number, because there is not a number n which added to its sum of digits gives 139579142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139579147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34894784 + ... + 34894787.

It is an arithmetic number, because the mean of its divisors is an integer number (52342179).

Almost surely, 2^139579142 is an apocalyptic number.

139579142 is a deficient number, since it is larger than the sum of its proper divisors (69789574).

139579142 is an equidigital number, since it uses as much as digits as its factorization.

139579142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69789573.

The product of its digits is 68040, while the sum is 41.

The square root of 139579142 is about 11814.3616839845. The cubic root of 139579142 is about 518.7285777770.

The spelling of 139579142 in words is "one hundred thirty-nine million, five hundred seventy-nine thousand, one hundred forty-two".