1518021449 has 8 divisors (see below), whose sum is σ = 1735760448. Its totient is φ = 1300502160.

The previous prime is 1518021437. The next prime is 1518021451. The reversal of 1518021449 is 9441208151.

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 1518021449 - 2¹² = 1518017353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1518021499) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39842 + ... + 67995.

It is an arithmetic number, because the mean of its divisors is an integer number (216970056).

Almost surely, 2^1518021449 is an apocalyptic number.

It is an amenable number.

1518021449 is a deficient number, since it is larger than the sum of its proper divisors (217738999).

1518021449 is a wasteful number, since it uses less digits than its factorization.

1518021449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109855.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1518021449 is about 38961.7947353558. The cubic root of 1518021449 is about 1149.2803182037.

The spelling of 1518021449 in words is "one billion, five hundred eighteen million, twenty-one thousand, four hundred forty-nine".