1240204134 has 96 divisors (see below), whose sum is σ = 2800479744. Its totient is φ = 365688960.

The previous prime is 1240204123. The next prime is 1240204139. The reversal of 1240204134 is 4314020421.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240204134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240204139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2525629 + ... + 2526119.

It is an arithmetic number, because the mean of its divisors is an integer number (29171664).

Almost surely, 2^1240204134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240204134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400239872).

1240204134 is an abundant number, since it is smaller than the sum of its proper divisors (1560275610).

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

1240204134 is a wasteful number, since it uses less digits than its factorization.

1240204134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1240204134 is about 35216.5321120635. The cubic root of 1240204134 is about 1074.3960217121.

Adding to 1240204134 its reverse (4314020421), we get a palindrome (5554224555).

The spelling of 1240204134 in words is "one billion, two hundred forty million, two hundred four thousand, one hundred thirty-four".