1216042454 has 8 divisors (see below), whose sum is σ = 1989887688. Its totient is φ = 552746560.

The previous prime is 1216042439. The next prime is 1216042463. The reversal of 1216042454 is 4542406121.

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

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 27637307 + ... + 27637350.

It is an arithmetic number, because the mean of its divisors is an integer number (248735961).

Almost surely, 2^1216042454 is an apocalyptic number.

1216042454 is a deficient number, since it is larger than the sum of its proper divisors (773845234).

1216042454 is a wasteful number, since it uses less digits than its factorization.

1216042454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55274670.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1216042454 is about 34871.8002689853. The cubic root of 1216042454 is about 1067.3730808709.

Adding to 1216042454 its reverse (4542406121), we get a palindrome (5758448575).

The spelling of 1216042454 in words is "one billion, two hundred sixteen million, forty-two thousand, four hundred fifty-four".