1242504440 has 32 divisors (see below), whose sum is σ = 2848387680. Its totient is φ = 487623552.

The previous prime is 1242504433. The next prime is 1242504443. The reversal of 1242504440 is 444052421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242504443) 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, 290924 + ... + 295163.

It is an arithmetic number, because the mean of its divisors is an integer number (89012115).

Almost surely, 2^1242504440 is an apocalyptic number.

1242504440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242504440 is an abundant number, since it is smaller than the sum of its proper divisors (1605883240).

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

1242504440 is a wasteful number, since it uses less digits than its factorization.

1242504440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586151 (or 586147 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1242504440 is about 35249.1764442802. The cubic root of 1242504440 is about 1075.0598675871.

Adding to 1242504440 its reverse (444052421), we get a palindrome (1686556861).

The spelling of 1242504440 in words is "one billion, two hundred forty-two million, five hundred four thousand, four hundred forty".