139151 has 4 divisors (see below), whose sum is σ = 139992. Its totient is φ = 138312.

The previous prime is 139133. The next prime is 139169. The reversal of 139151 is 151931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (139133) and next prime (139169).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139151.

It is not an unprimeable number, because it can be changed into a prime (139121) 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 3 ways as a sum of consecutive naturals, for example, 80 + ... + 533.

It is an arithmetic number, because the mean of its divisors is an integer number (34998).

2¹³⁹¹⁵¹ is an apocalyptic number.

139151 is a deficient number, since it is larger than the sum of its proper divisors (841).

139151 is an equidigital number, since it uses as much as digits as its factorization.

139151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840.

The product of its digits is 135, while the sum is 20.

The square root of 139151 is about 373.0294894509. The cubic root of 139151 is about 51.8197655671.

Multiplying 139151 by its product of digits (135), we get a triangular number (18785385 = T₆₁₂₉).

The spelling of 139151 in words is "one hundred thirty-nine thousand, one hundred fifty-one".