1240204512 has 48 divisors (see below), whose sum is σ = 3269935872. Its totient is φ = 411573120.

The previous prime is 1240204501. The next prime is 1240204523. The reversal of 1240204512 is 2154020421.

It is an interprime number because it is at equal distance from previous prime (1240204501) and next prime (1240204523).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6664 + ... + 50247.

It is an arithmetic number, because the mean of its divisors is an integer number (68123664).

Almost surely, 2^1240204512 is an apocalyptic number.

1240204512 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 1240204512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634967936).

1240204512 is an abundant number, since it is smaller than the sum of its proper divisors (2029731360).

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

1240204512 is a wasteful number, since it uses less digits than its factorization.

1240204512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57151 (or 57143 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1240204512 is about 35216.5374788607. The cubic root of 1240204512 is about 1074.3961308667.

Adding to 1240204512 its reverse (2154020421), we get a palindrome (3394224933).

The spelling of 1240204512 in words is "one billion, two hundred forty million, two hundred four thousand, five hundred twelve".