1242043040 has 48 divisors (see below), whose sum is σ = 3353519232. Its totient is φ = 425842944.

The previous prime is 1242043031. The next prime is 1242043051. The reversal of 1242043040 is 403402421.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 553364 + ... + 555603.

It is an arithmetic number, because the mean of its divisors is an integer number (69864984).

Almost surely, 2^1242043040 is an apocalyptic number.

1242043040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242043040 is an abundant number, since it is smaller than the sum of its proper divisors (2111476192).

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

1242043040 is a wasteful number, since it uses less digits than its factorization.

1242043040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108989 (or 1108981 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1242043040 is about 35242.6310028068. The cubic root of 1242043040 is about 1074.9267777781.

Adding to 1242043040 its reverse (403402421), we get a palindrome (1645445461).

The spelling of 1242043040 in words is "one billion, two hundred forty-two million, forty-three thousand, forty".