1242235040 has 48 divisors (see below), whose sum is σ = 3014113032. Its totient is φ = 483462144.

The previous prime is 1242234997. The next prime is 1242235061. The reversal of 1242235040 is 405322421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1241575696 + 659344 = 35236^2 + 812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1242234997 and 1242235015.

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, 98999 + ... + 110838.

Almost surely, 2^1242235040 is an apocalyptic number.

1242235040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242235040 is an abundant number, since it is smaller than the sum of its proper divisors (1771877992).

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

1242235040 is a wasteful number, since it uses less digits than its factorization.

1242235040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209889 (or 209881 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1242235040 is about 35245.3548712451. The cubic root of 1242235040 is about 1074.9821637567.

Adding to 1242235040 its reverse (405322421), we get a palindrome (1647557461).

The spelling of 1242235040 in words is "one billion, two hundred forty-two million, two hundred thirty-five thousand, forty".