1542985865 has 8 divisors (see below), whose sum is σ = 1866163200. Its totient is φ = 1224668592.

The previous prime is 1542985859. The next prime is 1542985891. The reversal of 1542985865 is 5685892451.

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 1542985865 - 2¹⁶ = 1542920329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214315 + ... + 1215584.

It is an arithmetic number, because the mean of its divisors is an integer number (233270400).

Almost surely, 2^1542985865 is an apocalyptic number.

It is an amenable number.

1542985865 is a deficient number, since it is larger than the sum of its proper divisors (323177335).

1542985865 is a wasteful number, since it uses less digits than its factorization.

1542985865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430031.

The product of its digits is 3456000, while the sum is 53.

The square root of 1542985865 is about 39280.8587609792. The cubic root of 1542985865 is about 1155.5462056775.

The spelling of 1542985865 in words is "one billion, five hundred forty-two million, nine hundred eighty-five thousand, eight hundred sixty-five".