1285275436 has 6 divisors (see below), whose sum is σ = 2249232020. Its totient is φ = 642637716.

The previous prime is 1285275427. The next prime is 1285275437. The reversal of 1285275436 is 6345725821.

It is a junction number, because it is equal to n+sod(n) for n = 1285275392 and 1285275401.

It is not an unprimeable number, because it can be changed into a prime (1285275437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160659426 + ... + 160659433.

Almost surely, 2^1285275436 is an apocalyptic number.

It is an amenable number.

1285275436 is a deficient number, since it is larger than the sum of its proper divisors (963956584).

1285275436 is a wasteful number, since it uses less digits than its factorization.

1285275436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321318863 (or 321318861 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 1285275436 is about 35850.7382908637. The cubic root of 1285275436 is about 1087.2566412959.

It can be divided in two parts, 12852 and 75436, that added together give a palindrome (88288).

The spelling of 1285275436 in words is "one billion, two hundred eighty-five million, two hundred seventy-five thousand, four hundred thirty-six".