1285149815253 has 12 divisors (see below), whose sum is σ = 1856855372268. Its totient is φ = 856522915200.

The previous prime is 1285149815249. The next prime is 1285149815293. The reversal of 1285149815253 is 3525189415821.

It is a happy number.

1285149815253 is a `hidden beast` number, since 1 + 2 + 8 + 51 + 498 + 1 + 52 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 968881925124 + 316267890129 = 984318^2 + 562377^2 .

It is not a de Polignac number, because 1285149815253 - 2² = 1285149815249 is a prime.

It is a super-2 number, since 2×1285149815253² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1285149815253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285149815203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20268948 + ... + 20332253.

It is an arithmetic number, because the mean of its divisors is an integer number (154737947689).

Almost surely, 2^{1285149815253} is an apocalyptic number.

It is an amenable number.

1285149815253 is a deficient number, since it is larger than the sum of its proper divisors (571705557015).

1285149815253 is a wasteful number, since it uses less digits than its factorization.

1285149815253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40604724 (or 40604721 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

The spelling of 1285149815253 in words is "one trillion, two hundred eighty-five billion, one hundred forty-nine million, eight hundred fifteen thousand, two hundred fifty-three".