139455 has 16 divisors (see below), whose sum is σ = 248160. Its totient is φ = 74304.

The previous prime is 139439. The next prime is 139457. The reversal of 139455 is 554931.

139455 = 165² + 166² + ... + 169².

139455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139455 - 2⁴ = 139439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (15510).

139455 is a Friedman number, since it can be written as 135*(9+4^5), using all its digits and the basic arithmetic operations.

2¹³⁹⁴⁵⁵ is an apocalyptic number.

139455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139455 is a deficient number, since it is larger than the sum of its proper divisors (108705).

139455 is a wasteful number, since it uses less digits than its factorization.

139455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1041 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 139455 is about 373.4367416310. The cubic root of 139455 is about 51.8574746044.

The spelling of 139455 in words is "one hundred thirty-nine thousand, four hundred fifty-five".