1242981379641 has 4 divisors (see below), whose sum is σ = 1657308506192. Its totient is φ = 828654253092.

The previous prime is 1242981379639. The next prime is 1242981379657. The reversal of 1242981379641 is 1469731892421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1242981379641 - 2¹ = 1242981379639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242981379621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207163563271 + ... + 207163563276.

It is an arithmetic number, because the mean of its divisors is an integer number (414327126548).

Almost surely, 2^{1242981379641} is an apocalyptic number.

It is an amenable number.

1242981379641 is a deficient number, since it is larger than the sum of its proper divisors (414327126551).

1242981379641 is an equidigital number, since it uses as much as digits as its factorization.

1242981379641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414327126550.

The product of its digits is 5225472, while the sum is 57.

The spelling of 1242981379641 in words is "one trillion, two hundred forty-two billion, nine hundred eighty-one million, three hundred seventy-nine thousand, six hundred forty-one".