Adding to 2520400 its reverse (40252), we get a palindrome (2560652).
It is a happy number.
It is a congruent number.
It is an unprimeable number.
22520400 is an apocalyptic number.
2520400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2520400 is a wasteful number, since it uses less digits than its factorization.
2520400 is an evil number, because the sum of its binary digits is even.
The square root of 2520400 is about 1587.5767697973. The cubic root of 2520400 is about 136.0890420356.
The spelling of 2520400 in words is "two million, five hundred twenty thousand, four hundred".