1242104020040 has 64 divisors (see below), whose sum is σ = 3091057245360. Its totient is φ = 446227799040.

The previous prime is 1242104020039. The next prime is 1242104020117. The reversal of 1242104020040 is 400204012421.

It can be written as a sum of positive squares in 8 ways, for example, as 164581130596 + 1077522889444 = 405686^2 + 1038038^2 .

It is a super-5 number, since 5×1242104020040⁵ (a number of 62 digits) contains 55555 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1242104019994 and 1242104020021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32259971 + ... + 32298450.

Almost surely, 2^{1242104020040} is an apocalyptic number.

1242104020040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242104020040 is an abundant number, since it is smaller than the sum of its proper divisors (1848953225320).

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

1242104020040 is a wasteful number, since it uses less digits than its factorization.

1242104020040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64558482 (or 64558478 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 1242104020040 its reverse (400204012421), we get a palindrome (1642308032461).

The spelling of 1242104020040 in words is "one trillion, two hundred forty-two billion, one hundred four million, twenty thousand, forty".