1392420 has 48 divisors (see below), whose sum is σ = 4072320. Its totient is φ = 354816.

The previous prime is 1392407. The next prime is 1392431. The reversal of 1392420 is 242931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (84840).

2^1392420 is an apocalyptic number.

1392420 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 1392420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2036160).

1392420 is an abundant number, since it is smaller than the sum of its proper divisors (2679900).

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

1392420 is a wasteful number, since it uses less digits than its factorization.

1392420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1042 counting only the distinct ones).

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

The square root of 1392420 is about 1180.0084745458. The cubic root of 1392420 is about 111.6666320140. Note that the first 4 decimals are identical.

The spelling of 1392420 in words is "one million, three hundred ninety-two thousand, four hundred twenty".