1281440853 has 48 divisors (see below), whose sum is σ = 2356862976. Its totient is φ = 651503520.

The previous prime is 1281440827. The next prime is 1281440857. The reversal of 1281440853 is 3580441821.

It is not a de Polignac number, because 1281440853 - 2⁶ = 1281440789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281440857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12900 + ... + 52242.

It is an arithmetic number, because the mean of its divisors is an integer number (49101312).

Almost surely, 2^1281440853 is an apocalyptic number.

It is an amenable number.

1281440853 is a deficient number, since it is larger than the sum of its proper divisors (1075422123).

1281440853 is a wasteful number, since it uses less digits than its factorization.

1281440853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39414 (or 39411 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1281440853 is about 35797.2185092641. The cubic root of 1281440853 is about 1086.1742976964.

The spelling of 1281440853 in words is "one billion, two hundred eighty-one million, four hundred forty thousand, eight hundred fifty-three".