1240543134 has 64 divisors (see below), whose sum is σ = 2894330880. Its totient is φ = 393101280.

The previous prime is 1240543103. The next prime is 1240543147. The reversal of 1240543134 is 4313450421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1240543098 and 1240543107.

It is a congruent number.

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, 204424 + ... + 210404.

It is an arithmetic number, because the mean of its divisors is an integer number (45223920).

Almost surely, 2^1240543134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240543134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447165440).

1240543134 is an abundant number, since it is smaller than the sum of its proper divisors (1653787746).

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

1240543134 is a wasteful number, since it uses less digits than its factorization.

1240543134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6182 (or 6176 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1240543134 is about 35221.3448635909. The cubic root of 1240543134 is about 1074.4939053484.

Adding to 1240543134 its reverse (4313450421), we get a palindrome (5553993555).

The spelling of 1240543134 in words is "one billion, two hundred forty million, five hundred forty-three thousand, one hundred thirty-four".