1392000 has 128 divisors (see below), whose sum is σ = 4773600. Its totient is φ = 358400.
The previous prime is 1391989. The next prime is 1392007. The reversal of 1392000 is 2931.
It is a tau number, because it is divible by the number of its divisors (128).
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1392007) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47986 + ... + 48014.
21392000 is an apocalyptic number.
1392000 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 1392000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2386800).
1392000 is an abundant number, since it is smaller than the sum of its proper divisors (3381600).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1392000 is an equidigital number, since it uses as much as digits as its factorization.
1392000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 61 (or 39 counting only the distinct ones).
The product of its (nonzero) digits is 54, while the sum is 15.
The square root of 1392000 is about 1179.8304963002. The cubic root of 1392000 is about 111.6554034332.
Subtracting from 1392000 its product of nonzero digits (54), we obtain a triangular number (1391946 = T1668).
Adding to 1392000 its reverse (2931), we get a palindrome (1394931).
The spelling of 1392000 in words is "one million, three hundred ninety-two thousand".
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