1239420 has 96 divisors (see below), whose sum is σ = 4290048. Its totient is φ = 260352.

The previous prime is 1239397. The next prime is 1239421. The reversal of 1239420 is 249321.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5347 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (44688).

2^1239420 is an apocalyptic number.

1239420 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 1239420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2145024).

1239420 is an abundant number, since it is smaller than the sum of its proper divisors (3050628).

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

1239420 is a wasteful number, since it uses less digits than its factorization.

1239420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1239420 is about 1113.2924144177. The cubic root of 1239420 is about 107.4169540699.

Subtracting from 1239420 its reverse (249321), we obtain a palindrome (990099).

The spelling of 1239420 in words is "one million, two hundred thirty-nine thousand, four hundred twenty".