1390459 has 4 divisors (see below), whose sum is σ = 1589104. Its totient is φ = 1191816.

The previous prime is 1390457. The next prime is 1390469. The reversal of 1390459 is 9540931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9540931 = 37 ⋅257863.

It is a cyclic number.

It is not a de Polignac number, because 1390459 - 2¹ = 1390457 is a prime.

It is a Duffinian number.

1390459 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390459.

It is not an unprimeable number, because it can be changed into a prime (1390457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99312 + ... + 99325.

It is an arithmetic number, because the mean of its divisors is an integer number (397276).

2^1390459 is an apocalyptic number.

1390459 is a deficient number, since it is larger than the sum of its proper divisors (198645).

1390459 is an equidigital number, since it uses as much as digits as its factorization.

1390459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198644.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1390459 is about 1179.1772555473. The cubic root of 1390459 is about 111.6141858784.

It can be divided in two parts, 1390 and 459, that added together give a square (1849 = 43²).

The spelling of 1390459 in words is "one million, three hundred ninety thousand, four hundred fifty-nine".