1442563857 has 16 divisors (see below), whose sum is σ = 2442436480. Its totient is φ = 824322096.

The previous prime is 1442563783. The next prime is 1442563867. The reversal of 1442563857 is 7583652441.

1442563857 is a `hidden beast` number, since 1 + 4 + 4 + 2 + 5 + 638 + 5 + 7 = 666.

It is not a de Polignac number, because 1442563857 - 2¹⁰ = 1442562833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442563867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3816118 + ... + 3816495.

It is an arithmetic number, because the mean of its divisors is an integer number (152652280).

Almost surely, 2^1442563857 is an apocalyptic number.

It is an amenable number.

1442563857 is a deficient number, since it is larger than the sum of its proper divisors (999872623).

1442563857 is an equidigital number, since it uses as much as digits as its factorization.

1442563857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632629 (or 7632623 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 1442563857 is about 37981.0986807912. The cubic root of 1442563857 is about 1129.9130266942.

The spelling of 1442563857 in words is "one billion, four hundred forty-two million, five hundred sixty-three thousand, eight hundred fifty-seven".