1516454421 has 8 divisors (see below), whose sum is σ = 2027275680. Its totient is φ = 1008301392.

The previous prime is 1516454411. The next prime is 1516454441. The reversal of 1516454421 is 1244546151.

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

It is not a de Polignac number, because 1516454421 - 2²⁹ = 979583509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516454411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665730 + ... + 668003.

It is an arithmetic number, because the mean of its divisors is an integer number (253409460).

Almost surely, 2^1516454421 is an apocalyptic number.

It is an amenable number.

1516454421 is a deficient number, since it is larger than the sum of its proper divisors (510821259).

1516454421 is a wasteful number, since it uses less digits than its factorization.

1516454421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334115.

The product of its digits is 19200, while the sum is 33.

The square root of 1516454421 is about 38941.6797403502. The cubic root of 1516454421 is about 1148.8847211381.

The spelling of 1516454421 in words is "one billion, five hundred sixteen million, four hundred fifty-four thousand, four hundred twenty-one".