139870 has 16 divisors (see below), whose sum is σ = 256608. Its totient is φ = 54880.

The previous prime is 139861. The next prime is 139871. The reversal of 139870 is 78931.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139871) 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, 612 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (16038).

2¹³⁹⁸⁷⁰ is an apocalyptic number.

139870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139870 is a deficient number, since it is larger than the sum of its proper divisors (116738).

139870 is a wasteful number, since it uses less digits than its factorization.

139870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 139870 is about 373.9919785236. The cubic root of 139870 is about 51.9088640357.

The spelling of 139870 in words is "one hundred thirty-nine thousand, eight hundred seventy".