1421322240 has 192 divisors, whose sum is σ = 4898275200. Its totient is φ = 349765632.

The previous prime is 1421322239. The next prime is 1421322251. The reversal of 1421322240 is 422231241.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397581 + ... + 401139.

It is an arithmetic number, because the mean of its divisors is an integer number (25511850).

Almost surely, 2^1421322240 is an apocalyptic number.

1421322240 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 1421322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449137600).

1421322240 is an abundant number, since it is smaller than the sum of its proper divisors (3476952960).

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

1421322240 is a wasteful number, since it uses less digits than its factorization.

1421322240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602 (or 3582 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1421322240 is about 37700.4275837821. The cubic root of 1421322240 is about 1124.3396262644.

Adding to 1421322240 its reverse (422231241), we get a palindrome (1843553481).

Subtracting from 1421322240 its reverse (422231241), we obtain a palindrome (999090999).

The spelling of 1421322240 in words is "one billion, four hundred twenty-one million, three hundred twenty-two thousand, two hundred forty".