1230139 has 4 divisors (see below), whose sum is σ = 1263424. Its totient is φ = 1196856.

The previous prime is 1230127. The next prime is 1230167. The reversal of 1230139 is 9310321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9310321 = 41 ⋅227081.

It is a cyclic number.

It is not a de Polignac number, because 1230139 - 2⁵ = 1230107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16587 + ... + 16660.

It is an arithmetic number, because the mean of its divisors is an integer number (315856).

2^1230139 is an apocalyptic number.

1230139 is a deficient number, since it is larger than the sum of its proper divisors (33285).

1230139 is an equidigital number, since it uses as much as digits as its factorization.

1230139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33284.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1230139 is about 1109.1163149102. The cubic root of 1230139 is about 107.1481628695.

It can be divided in two parts, 1230 and 139, that added together give a square (1369 = 37²).

The spelling of 1230139 in words is "one million, two hundred thirty thousand, one hundred thirty-nine".