1240536120 has 128 divisors (see below), whose sum is σ = 3786531840. Its totient is φ = 325094400.

The previous prime is 1240536107. The next prime is 1240536133. The reversal of 1240536120 is 216350421.

It is an interprime number because it is at equal distance from previous prime (1240536107) and next prime (1240536133).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2063820 + ... + 2064420.

It is an arithmetic number, because the mean of its divisors is an integer number (29582280).

Almost surely, 2^1240536120 is an apocalyptic number.

1240536120 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 1240536120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893265920).

1240536120 is an abundant number, since it is smaller than the sum of its proper divisors (2545995720).

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

1240536120 is a wasteful number, since it uses less digits than its factorization.

1240536120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1240536120 is about 35221.2452931466. The cubic root of 1240536120 is about 1074.4918802906.

Adding to 1240536120 its reverse (216350421), we get a palindrome (1456886541).

The spelling of 1240536120 in words is "one billion, two hundred forty million, five hundred thirty-six thousand, one hundred twenty".