1285532479 has 16 divisors (see below), whose sum is σ = 1603526400. Its totient is φ = 1001223360.

The previous prime is 1285532407. The next prime is 1285532489. The reversal of 1285532479 is 9742355821.

It is a cyclic number.

It is not a de Polignac number, because 1285532479 - 2⁷ = 1285532351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285532489) 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, 311572 + ... + 315670.

It is an arithmetic number, because the mean of its divisors is an integer number (100220400).

Almost surely, 2^1285532479 is an apocalyptic number.

1285532479 is a deficient number, since it is larger than the sum of its proper divisors (317993921).

1285532479 is a wasteful number, since it uses less digits than its factorization.

1285532479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190.

The product of its digits is 604800, while the sum is 46.

The square root of 1285532479 is about 35854.3230168971. The cubic root of 1285532479 is about 1087.3291168324.

The spelling of 1285532479 in words is "one billion, two hundred eighty-five million, five hundred thirty-two thousand, four hundred seventy-nine".