1242002040 has 64 divisors (see below), whose sum is σ = 3770928000. Its totient is φ = 327207552.

The previous prime is 1242002023. The next prime is 1242002059. The reversal of 1242002040 is 402002421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52390 + ... + 72309.

It is an arithmetic number, because the mean of its divisors is an integer number (58920750).

Almost surely, 2^1242002040 is an apocalyptic number.

1242002040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242002040 is an abundant number, since it is smaller than the sum of its proper divisors (2528925960).

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

1242002040 is a wasteful number, since it uses less digits than its factorization.

1242002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124796 (or 124792 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1242002040 is about 35242.0493161224. The cubic root of 1242002040 is about 1074.9149498244.

Adding to 1242002040 its reverse (402002421), we get a palindrome (1644004461).

The spelling of 1242002040 in words is "one billion, two hundred forty-two million, two thousand, forty".