1243240141 has 48 divisors (see below), whose sum is σ = 1578225600. Its totient is φ = 965099520.

The previous prime is 1243240111. The next prime is 1243240147. The reversal of 1243240141 is 1410423421.

It is a happy number.

It is not a de Polignac number, because 1243240141 - 2¹¹ = 1243238093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243240147) 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, 2768685 + ... + 2769133.

It is an arithmetic number, because the mean of its divisors is an integer number (32879700).

Almost surely, 2^1243240141 is an apocalyptic number.

1243240141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1243240141 is a deficient number, since it is larger than the sum of its proper divisors (334985459).

1243240141 is a wasteful number, since it uses less digits than its factorization.

1243240141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1243240141 is about 35259.6106189504. The cubic root of 1243240141 is about 1075.2720107770.

Adding to 1243240141 its reverse (1410423421), we get a palindrome (2653663562).

The spelling of 1243240141 in words is "one billion, two hundred forty-three million, two hundred forty thousand, one hundred forty-one".