1243041340 has 24 divisors (see below), whose sum is σ = 2636236512. Its totient is φ = 492292800.

The previous prime is 1243041337. The next prime is 1243041353. The reversal of 1243041340 is 431403421.

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, 305664 + ... + 309703.

It is an arithmetic number, because the mean of its divisors is an integer number (109843188).

Almost surely, 2^1243041340 is an apocalyptic number.

1243041340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243041340 is an abundant number, since it is smaller than the sum of its proper divisors (1393195172).

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

1243041340 is a wasteful number, since it uses less digits than its factorization.

1243041340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615477 (or 615475 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1243041340 is about 35256.7914025085. The cubic root of 1243041340 is about 1075.2146937340.

Adding to 1243041340 its reverse (431403421), we get a palindrome (1674444761).

The spelling of 1243041340 in words is "one billion, two hundred forty-three million, forty-one thousand, three hundred forty".