1242023540340 has 96 divisors (see below), whose sum is σ = 3882045758976. Its totient is φ = 294094362240.

The previous prime is 1242023540299. The next prime is 1242023540357. The reversal of 1242023540340 is 430453202421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1242023540298 and 1242023540307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21853642 + ... + 21910401.

It is an arithmetic number, because the mean of its divisors is an integer number (40437976656).

Almost surely, 2^{1242023540340} is an apocalyptic number.

1242023540340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242023540340 is an abundant number, since it is smaller than the sum of its proper divisors (2640022218636).

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

1242023540340 is a wasteful number, since it uses less digits than its factorization.

1242023540340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43764109 (or 43764107 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 1242023540340 its reverse (430453202421), we get a palindrome (1672476742761).

The spelling of 1242023540340 in words is "one trillion, two hundred forty-two billion, twenty-three million, five hundred forty thousand, three hundred forty".