1285293252 has 12 divisors (see below), whose sum is σ = 2999017616. Its totient is φ = 428431080.

The previous prime is 1285293197. The next prime is 1285293257. The reversal of 1285293252 is 2523925821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1285293252.

It is not an unprimeable number, because it can be changed into a prime (1285293257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53553874 + ... + 53553897.

Almost surely, 2^1285293252 is an apocalyptic number.

1285293252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285293252 is an abundant number, since it is smaller than the sum of its proper divisors (1713724364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285293252 is a wasteful number, since it uses less digits than its factorization.

1285293252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107107778 (or 107107776 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 1285293252 is about 35850.9867646624. The cubic root of 1285293252 is about 1087.2616649856.

The spelling of 1285293252 in words is "one billion, two hundred eighty-five million, two hundred ninety-three thousand, two hundred fifty-two".