1430340 has 48 divisors (see below), whose sum is σ = 4139520. Its totient is φ = 368640.

The previous prime is 1430321. The next prime is 1430357. The reversal of 1430340 is 430341.

1430340 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1476 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (86240).

2^1430340 is an apocalyptic number.

1430340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1430340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069760).

1430340 is an abundant number, since it is smaller than the sum of its proper divisors (2709180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1430340 is a wasteful number, since it uses less digits than its factorization.

1430340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1430340 is about 1195.9682270027. The cubic root of 1430340 is about 112.6712453741.

Adding to 1430340 its reverse (430341), we get a palindrome (1860681).

Subtracting from 1430340 its reverse (430341), we obtain a palindrome (999999).

It can be divided in two parts, 1430 and 340, that added together give a triangular number (1770 = T₅₉).

The spelling of 1430340 in words is "one million, four hundred thirty thousand, three hundred forty".