1240321152 has 256 divisors, whose sum is σ = 3915233280. Its totient is φ = 340623360.

The previous prime is 1240321133. The next prime is 1240321157. The reversal of 1240321152 is 2511230421.

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

It is not an unprimeable number, because it can be changed into a prime (1240321157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12786768 + ... + 12786864.

It is an arithmetic number, because the mean of its divisors is an integer number (15293880).

Almost surely, 2^1240321152 is an apocalyptic number.

1240321152 is a gapful number since it is divisible by the number (12) 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 1240321152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957616640).

1240321152 is an abundant number, since it is smaller than the sum of its proper divisors (2674912128).

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

1240321152 is an equidigital number, since it uses as much as digits as its factorization.

1240321152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1240321152 is about 35218.1934800750. The cubic root of 1240321152 is about 1074.4298117731.

Adding to 1240321152 its reverse (2511230421), we get a palindrome (3751551573).

The spelling of 1240321152 in words is "one billion, two hundred forty million, three hundred twenty-one thousand, one hundred fifty-two".