1390203 has 14 divisors (see below), whose sum is σ = 2085444. Its totient is φ = 926316.

The previous prime is 1390199. The next prime is 1390219. The reversal of 1390203 is 3020931.

It is not a de Polignac number, because 1390203 - 2² = 1390199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 225 + ... + 1682.

2^1390203 is an apocalyptic number.

1390203 is a deficient number, since it is larger than the sum of its proper divisors (695241).

1390203 is an frugal number, since it uses more digits than its factorization.

1390203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1910 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1390203 is about 1179.0687002885. The cubic root of 1390203 is about 111.6073356260.

Subtracting from 1390203 its product of nonzero digits (162), we obtain a square (1390041 = 1179²).

The spelling of 1390203 in words is "one million, three hundred ninety thousand, two hundred three".