1285331252 has 24 divisors (see below), whose sum is σ = 2276037792. Its totient is φ = 635060000.

The previous prime is 1285331251. The next prime is 1285331261. The reversal of 1285331252 is 2521335821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285331251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224627 + ... + 230277.

It is an arithmetic number, because the mean of its divisors is an integer number (94834908).

Almost surely, 2^1285331252 is an apocalyptic number.

It is an amenable number.

1285331252 is a deficient number, since it is larger than the sum of its proper divisors (990706540).

1285331252 is a wasteful number, since it uses less digits than its factorization.

1285331252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6319 (or 6317 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 1285331252 is about 35851.5167322109. The cubic root of 1285331252 is about 1087.2723799297.

The spelling of 1285331252 in words is "one billion, two hundred eighty-five million, three hundred thirty-one thousand, two hundred fifty-two".