1390234 has 4 divisors (see below), whose sum is σ = 2085354. Its totient is φ = 695116.

The previous prime is 1390219. The next prime is 1390241. The reversal of 1390234 is 4320931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4320931 = 53 ⋅81527.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 124609 = 1125^2 + 353^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 347557 + ... + 347560.

2^1390234 is an apocalyptic number.

1390234 is a deficient number, since it is larger than the sum of its proper divisors (695120).

1390234 is an equidigital number, since it uses as much as digits as its factorization.

1390234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695119.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1390234 is about 1179.0818461837. The cubic root of 1390234 is about 111.6081651935.

The spelling of 1390234 in words is "one million, three hundred ninety thousand, two hundred thirty-four".