1322421240 has 64 divisors (see below), whose sum is σ = 4534018560. Its totient is φ = 302267520.

The previous prime is 1322421131. The next prime is 1322421241. The reversal of 1322421240 is 421242231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322421241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786316 + ... + 787995.

It is an arithmetic number, because the mean of its divisors is an integer number (70844040).

Almost surely, 2^1322421240 is an apocalyptic number.

1322421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322421240 is an abundant number, since it is smaller than the sum of its proper divisors (3211597320).

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

1322421240 is a wasteful number, since it uses less digits than its factorization.

1322421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574332 (or 1574328 counting only the distinct ones).

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

The square root of 1322421240 is about 36365.1102019504. The cubic root of 1322421240 is about 1097.6316095546.

Adding to 1322421240 its reverse (421242231), we get a palindrome (1743663471).

The spelling of 1322421240 in words is "one billion, three hundred twenty-two million, four hundred twenty-one thousand, two hundred forty".