1240128412 has 12 divisors (see below), whose sum is σ = 2197696480. Its totient is φ = 612215136.

The previous prime is 1240128391. The next prime is 1240128419. The reversal of 1240128412 is 2148210421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240128419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1961913 + ... + 1962544.

Almost surely, 2^1240128412 is an apocalyptic number.

It is an amenable number.

1240128412 is a deficient number, since it is larger than the sum of its proper divisors (957568068).

1240128412 is a wasteful number, since it uses less digits than its factorization.

1240128412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924540 (or 3924538 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 1240128412 is about 35215.4570039919. The cubic root of 1240128412 is about 1074.3741551314.

Adding to 1240128412 its reverse (2148210421), we get a palindrome (3388338833).

The spelling of 1240128412 in words is "one billion, two hundred forty million, one hundred twenty-eight thousand, four hundred twelve".