1522421440 has 28 divisors (see below), whose sum is σ = 3625266816. Its totient is φ = 608968448.

The previous prime is 1522421429. The next prime is 1522421443. The reversal of 1522421440 is 441242251.

It is not an unprimeable number, because it can be changed into a prime (1522421443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2378464 + ... + 2379103.

Almost surely, 2^1522421440 is an apocalyptic number.

1522421440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1522421440 is an abundant number, since it is smaller than the sum of its proper divisors (2102845376).

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

1522421440 is an equidigital number, since it uses as much as digits as its factorization.

1522421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757584 (or 4757574 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1522421440 is about 39018.2193340496. The cubic root of 1522421440 is about 1150.3896449026.

Adding to 1522421440 its reverse (441242251), we get a palindrome (1963663691).

The spelling of 1522421440 in words is "one billion, five hundred twenty-two million, four hundred twenty-one thousand, four hundred forty".