1285216479 has 6 divisors (see below), whose sum is σ = 1856423816. Its totient is φ = 856810980.

The previous prime is 1285216447. The next prime is 1285216489. The reversal of 1285216479 is 9746125821.

1285216479 is a `hidden beast` number, since 128 + 52 + 1 + 6 + 479 = 666.

It is not a de Polignac number, because 1285216479 - 2⁵ = 1285216447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285216409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71400907 + ... + 71400924.

Almost surely, 2^1285216479 is an apocalyptic number.

1285216479 is a deficient number, since it is larger than the sum of its proper divisors (571207337).

1285216479 is a wasteful number, since it uses less digits than its factorization.

1285216479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142801837 (or 142801834 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1285216479 is about 35849.9160250063. The cubic root of 1285216479 is about 1087.2400164885.

The spelling of 1285216479 in words is "one billion, two hundred eighty-five million, two hundred sixteen thousand, four hundred seventy-nine".