1151235240 has 128 divisors (see below), whose sum is σ = 3668976000. Its totient is φ = 287981568.

The previous prime is 1151235233. The next prime is 1151235263. The reversal of 1151235240 is 425321511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1151235240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 772416 + ... + 773904.

It is an arithmetic number, because the mean of its divisors is an integer number (28663875).

Almost surely, 2^1151235240 is an apocalyptic number.

1151235240 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 1151235240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834488000).

1151235240 is an abundant number, since it is smaller than the sum of its proper divisors (2517740760).

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

1151235240 is a wasteful number, since it uses less digits than its factorization.

1151235240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1151235240 is about 33929.8576478004. The cubic root of 1151235240 is about 1048.0645343202.

Adding to 1151235240 its reverse (425321511), we get a palindrome (1576556751).

The spelling of 1151235240 in words is "one billion, one hundred fifty-one million, two hundred thirty-five thousand, two hundred forty".