1242454542421 has 8 divisors (see below), whose sum is σ = 1244203706304. Its totient is φ = 1240706154240.

The previous prime is 1242454542419. The next prime is 1242454542449.

1242454542421 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242454542421 - 2¹ = 1242454542419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242454542451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3049845 + ... + 3433141.

It is an arithmetic number, because the mean of its divisors is an integer number (155525463288).

Almost surely, 2^{1242454542421} is an apocalyptic number.

It is an amenable number.

1242454542421 is a deficient number, since it is larger than the sum of its proper divisors (1749163883).

1242454542421 is an equidigital number, since it uses as much as digits as its factorization.

1242454542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387851.

The product of its digits is 409600, while the sum is 40.

The spelling of 1242454542421 in words is "one trillion, two hundred forty-two billion, four hundred fifty-four million, five hundred forty-two thousand, four hundred twenty-one".