1285626812 has 6 divisors (see below), whose sum is σ = 2249846928. Its totient is φ = 642813404.

The previous prime is 1285626799. The next prime is 1285626817. The reversal of 1285626812 is 2186265821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285626812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285626817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160703348 + ... + 160703355.

It is an arithmetic number, because the mean of its divisors is an integer number (374974488).

Almost surely, 2^1285626812 is an apocalyptic number.

It is an amenable number.

1285626812 is a deficient number, since it is larger than the sum of its proper divisors (964220116).

1285626812 is a wasteful number, since it uses less digits than its factorization.

1285626812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321406707 (or 321406705 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 1285626812 is about 35855.6384966158. The cubic root of 1285626812 is about 1087.3557124288.

The spelling of 1285626812 in words is "one billion, two hundred eighty-five million, six hundred twenty-six thousand, eight hundred twelve".