1256064343 has 8 divisors (see below), whose sum is σ = 1276195712. Its totient is φ = 1235973816.

The previous prime is 1256064307. The next prime is 1256064347. The reversal of 1256064343 is 3434606521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256064343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1256064299 and 1256064308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256064347) 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, 55096 + ... + 74482.

It is an arithmetic number, because the mean of its divisors is an integer number (159524464).

Almost surely, 2^1256064343 is an apocalyptic number.

1256064343 is a deficient number, since it is larger than the sum of its proper divisors (20131369).

1256064343 is an equidigital number, since it uses as much as digits as its factorization.

1256064343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20421.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 1256064343 is about 35440.9980531023. The cubic root of 1256064343 is about 1078.9565662360.

The spelling of 1256064343 in words is "one billion, two hundred fifty-six million, sixty-four thousand, three hundred forty-three".