1256085453 has 24 divisors (see below), whose sum is σ = 2032924608. Its totient is φ = 686554176.

The previous prime is 1256085431. The next prime is 1256085463. The reversal of 1256085453 is 3545806521.

It is not a de Polignac number, because 1256085453 - 2⁸ = 1256085197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256085403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182376 + ... + 189137.

It is an arithmetic number, because the mean of its divisors is an integer number (84705192).

Almost surely, 2^1256085453 is an apocalyptic number.

It is an amenable number.

1256085453 is a deficient number, since it is larger than the sum of its proper divisors (776839155).

1256085453 is a wasteful number, since it uses less digits than its factorization.

1256085453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371553 (or 371546 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 1256085453 is about 35441.2958707776. The cubic root of 1256085453 is about 1078.9626106837.

The spelling of 1256085453 in words is "one billion, two hundred fifty-six million, eighty-five thousand, four hundred fifty-three".