139858 has 4 divisors (see below), whose sum is σ = 209790. Its totient is φ = 69928.

The previous prime is 139837. The next prime is 139861. The reversal of 139858 is 858931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 139129 + 729 = 373^2 + 27^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34963 + ... + 34966.

2¹³⁹⁸⁵⁸ is an apocalyptic number.

139858 is a deficient number, since it is larger than the sum of its proper divisors (69932).

139858 is an equidigital number, since it uses as much as digits as its factorization.

139858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69931.

The product of its digits is 8640, while the sum is 34.

The square root of 139858 is about 373.9759350547. The cubic root of 139858 is about 51.9073795044.

The spelling of 139858 in words is "one hundred thirty-nine thousand, eight hundred fifty-eight".