1282120853 has 8 divisors (see below), whose sum is σ = 1381577400. Its totient is φ = 1182783168.

The previous prime is 1282120831. The next prime is 1282120867. The reversal of 1282120853 is 3580212821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70593604 + 1211527249 = 8402^2 + 34807^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1282120853 - 2⁶ = 1282120789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282120813) 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, 6638 + ... + 51071.

It is an arithmetic number, because the mean of its divisors is an integer number (172697175).

Almost surely, 2^1282120853 is an apocalyptic number.

1282120853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1282120853 is a deficient number, since it is larger than the sum of its proper divisors (99456547).

1282120853 is a wasteful number, since it uses less digits than its factorization.

1282120853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59431.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1282120853 is about 35806.7151942202. The cubic root of 1282120853 is about 1086.3663908163.

The spelling of 1282120853 in words is "one billion, two hundred eighty-two million, one hundred twenty thousand, eight hundred fifty-three".