7212240 has 240 divisors, whose sum is σ = 29248128. Its totient is φ = 1617408.

The previous prime is 7212239. The next prime is 7212253. The reversal of 7212240 is 422127.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136054 + ... + 136106.

Almost surely, 2^7212240 is an apocalyptic number.

7212240 is a gapful number since it is divisible by the number (70) 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 7212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14624064).

7212240 is an abundant number, since it is smaller than the sum of its proper divisors (22035888).

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

7212240 is a wasteful number, since it uses less digits than its factorization.

7212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7212240 is about 2685.5613938244. The cubic root of 7212240 is about 193.2072371040.

Adding to 7212240 its reverse (422127), we get a palindrome (7634367).

The spelling of 7212240 in words is "seven million, two hundred twelve thousand, two hundred forty".