1230420 has 24 divisors (see below), whose sum is σ = 3445344. Its totient is φ = 328096.

The previous prime is 1230401. The next prime is 1230433. The reversal of 1230420 is 240321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1230396 and 1230405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10194 + ... + 10313.

It is an arithmetic number, because the mean of its divisors is an integer number (143556).

2^1230420 is an apocalyptic number.

1230420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230420 is an abundant number, since it is smaller than the sum of its proper divisors (2214924).

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

1230420 is a wasteful number, since it uses less digits than its factorization.

1230420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20519 (or 20517 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1230420 is about 1109.2429851029. The cubic root of 1230420 is about 107.1563208477.

Adding to 1230420 its reverse (240321), we get a palindrome (1470741).

Subtracting from 1230420 its reverse (240321), we obtain a palindrome (990099).

The spelling of 1230420 in words is "one million, two hundred thirty thousand, four hundred twenty".