The square root of 1040400 is 1020.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a Duffinian number.
It is a nialpdrome in base 12.
21040400 is an apocalyptic number.
1040400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
1040400 is the 1020-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1040400
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1040400 is a wasteful number, since it uses less digits than its factorization.
1040400 is an evil number, because the sum of its binary digits is even.
The cubic root of 1040400 is about 101.3289279402.
Multiplying 1040400 by its product of nonzero digits (16), we get a square (16646400 = 40802).
1040400 divided by its product of nonzero digits (16) gives a square (65025 = 2552).
Adding to 1040400 its reverse (40401), we get a palindrome (1080801).
Subtracting from 1040400 its reverse (40401), we obtain a palindrome (999999).
Multiplying 1040400 by its reverse (40401), we get a square (42033200400 = 2050202).
The spelling of 1040400 in words is "one million, forty thousand, four hundred".