1242438045685 has 32 divisors (see below), whose sum is σ = 1550290120704. Its totient is φ = 954869472000.

The previous prime is 1242438045661. The next prime is 1242438045727. The reversal of 1242438045685 is 5865408342421.

It is a happy number.

It is not a de Polignac number, because 1242438045685 - 2¹³ = 1242438037493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11581995 + ... + 11688775.

It is an arithmetic number, because the mean of its divisors is an integer number (48446566272).

Almost surely, 2^{1242438045685} is an apocalyptic number.

It is an amenable number.

1242438045685 is a deficient number, since it is larger than the sum of its proper divisors (307852075019).

1242438045685 is a wasteful number, since it uses less digits than its factorization.

1242438045685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107365.

The product of its (nonzero) digits is 7372800, while the sum is 52.

The spelling of 1242438045685 in words is "one trillion, two hundred forty-two billion, four hundred thirty-eight million, forty-five thousand, six hundred eighty-five".