139557 has 8 divisors (see below), whose sum is σ = 203040. Its totient is φ = 84560.

The previous prime is 139547. The next prime is 139571. The reversal of 139557 is 755931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 139557 - 2⁶ = 139493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139537) 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, 2082 + ... + 2147.

It is an arithmetic number, because the mean of its divisors is an integer number (25380).

2¹³⁹⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

139557 is a deficient number, since it is larger than the sum of its proper divisors (63483).

139557 is a wasteful number, since it uses less digits than its factorization.

139557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243.

The product of its digits is 4725, while the sum is 30.

The square root of 139557 is about 373.5732859828. The cubic root of 139557 is about 51.8701146994.

It can be divided in two parts, 139 and 557, that added together give a palindrome (696).

The spelling of 139557 in words is "one hundred thirty-nine thousand, five hundred fifty-seven".