1285331253 has 8 divisors (see below), whose sum is σ = 1722748416. Its totient is φ = 852400800.

The previous prime is 1285331251. The next prime is 1285331261. The reversal of 1285331253 is 3521335821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285331253 - 2¹ = 1285331251 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1121008 + ... + 1122153.

It is an arithmetic number, because the mean of its divisors is an integer number (215343552).

Almost surely, 2^1285331253 is an apocalyptic number.

It is an amenable number.

1285331253 is a deficient number, since it is larger than the sum of its proper divisors (437417163).

1285331253 is a wasteful number, since it uses less digits than its factorization.

1285331253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243355.

The product of its digits is 21600, while the sum is 33.

The square root of 1285331253 is about 35851.5167461573. The cubic root of 1285331253 is about 1087.2723802117.

The spelling of 1285331253 in words is "one billion, two hundred eighty-five million, three hundred thirty-one thousand, two hundred fifty-three".