1521222 has 8 divisors (see below), whose sum is σ = 3042456. Its totient is φ = 507072.

The previous prime is 1521217. The next prime is 1521227. The reversal of 1521222 is 2221251.

It is an interprime number because it is at equal distance from previous prime (1521217) and next prime (1521227).

It is a sphenic number, since it is the product of 3 distinct primes.

1521222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126763 + ... + 126774.

It is an arithmetic number, because the mean of its divisors is an integer number (380307).

2^1521222 is an apocalyptic number.

1521222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1521222 is a wasteful number, since it uses less digits than its factorization.

1521222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253542.

The product of its digits is 80, while the sum is 15.

The square root of 1521222 is about 1233.3782874690. The cubic root of 1521222 is about 115.0087453967.

Adding to 1521222 its reverse (2221251), we get a palindrome (3742473).

The spelling of 1521222 in words is "one million, five hundred twenty-one thousand, two hundred twenty-two".