1522240 has 56 divisors (see below), whose sum is σ = 3730752. Its totient is φ = 591360.

The previous prime is 1522201. The next prime is 1522249. The reversal of 1522240 is 422251.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1522249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21405 + ... + 21475.

2^1522240 is an apocalyptic number.

1522240 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 1522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1865376).

1522240 is an abundant number, since it is smaller than the sum of its proper divisors (2208512).

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

1522240 is an equidigital number, since it uses as much as digits as its factorization.

1522240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1522240 is about 1233.7909061101. The cubic root of 1522240 is about 115.0343942492.

Adding to 1522240 its reverse (422251), we get a palindrome (1944491).

The spelling of 1522240 in words is "one million, five hundred twenty-two thousand, two hundred forty".