1390263 has 16 divisors (see below), whose sum is σ = 2135040. Its totient is φ = 788256.

The previous prime is 1390253. The next prime is 1390283. The reversal of 1390263 is 3620931.

It is not a de Polignac number, because 1390263 - 2⁴ = 1390247 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4881 + ... + 5157.

It is an arithmetic number, because the mean of its divisors is an integer number (133440).

2^1390263 is an apocalyptic number.

1390263 is a deficient number, since it is larger than the sum of its proper divisors (744777).

1390263 is a wasteful number, since it uses less digits than its factorization.

1390263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 1390263 is about 1179.0941438240. The cubic root of 1390263 is about 111.6089412294.

It can be divided in two parts, 13902 and 63, that multiplied together give a triangular number (875826 = T₁₃₂₃).

The spelling of 1390263 in words is "one million, three hundred ninety thousand, two hundred sixty-three".