139051 has 4 divisors (see below), whose sum is σ = 151704. Its totient is φ = 126400.

The previous prime is 139033. The next prime is 139067. The reversal of 139051 is 150931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150931 = 11 ⋅13721.

It is a cyclic number.

It is not a de Polignac number, because 139051 - 2⁷ = 138923 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (139021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6310 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (37926).

2¹³⁹⁰⁵¹ is an apocalyptic number.

139051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139051 is a deficient number, since it is larger than the sum of its proper divisors (12653).

139051 is a wasteful number, since it uses less digits than its factorization.

139051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12652.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 139051 is about 372.8954277006. The cubic root of 139051 is about 51.8073492750.

Adding to 139051 its reverse (150931), we get a palindrome (289982).

It can be divided in two parts, 1390 and 51, that added together give a palindrome (1441).

The spelling of 139051 in words is "one hundred thirty-nine thousand, fifty-one".