1243241040 has 40 divisors (see below), whose sum is σ = 3854047968. Its totient is φ = 331530880.

The previous prime is 1243241009. The next prime is 1243241047. The reversal of 1243241040 is 401423421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1243240998 and 1243241016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243241047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2589846 + ... + 2590325.

Almost surely, 2^1243241040 is an apocalyptic number.

1243241040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243241040 is an abundant number, since it is smaller than the sum of its proper divisors (2610806928).

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

1243241040 is a wasteful number, since it uses less digits than its factorization.

1243241040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180187 (or 5180181 counting only the distinct ones).

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

The square root of 1243241040 is about 35259.6233672454. The cubic root of 1243241040 is about 1075.2722699571.

Adding to 1243241040 its reverse (401423421), we get a palindrome (1644664461).

The spelling of 1243241040 in words is "one billion, two hundred forty-three million, two hundred forty-one thousand, forty".