1521422442 has 24 divisors (see below), whose sum is σ = 3297305700. Its totient is φ = 507003840.

The previous prime is 1521422437. The next prime is 1521422449. The reversal of 1521422442 is 2442241251.

It is a happy number.

1521422442 is a `hidden beast` number, since 1 + 5 + 214 + 2 + 2 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1035616761 + 485805681 = 32181^2 + 22041^2 .

It is not an unprimeable number, because it can be changed into a prime (1521422449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74592 + ... + 92772.

Almost surely, 2^1521422442 is an apocalyptic number.

1521422442 is an abundant number, since it is smaller than the sum of its proper divisors (1775883258).

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

1521422442 is a wasteful number, since it uses less digits than its factorization.

1521422442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22838 (or 22835 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 1521422442 is about 39005.4155470750. The cubic root of 1521422442 is about 1150.1379650482.

Adding to 1521422442 its reverse (2442241251), we get a palindrome (3963663693).

The spelling of 1521422442 in words is "one billion, five hundred twenty-one million, four hundred twenty-two thousand, four hundred forty-two".