139551 has 8 divisors (see below), whose sum is σ = 187824. Its totient is φ = 92160.

The previous prime is 139547. The next prime is 139571. The reversal of 139551 is 155931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139551 - 2² = 139547 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (23478).

2¹³⁹⁵⁵¹ is an apocalyptic number.

139551 is a deficient number, since it is larger than the sum of its proper divisors (48273).

139551 is a wasteful number, since it uses less digits than its factorization.

139551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 675, while the sum is 24.

The square root of 139551 is about 373.5652553437. The cubic root of 139551 is about 51.8693713349.

The spelling of 139551 in words is "one hundred thirty-nine thousand, five hundred fifty-one".