1256883145 has 8 divisors (see below), whose sum is σ = 1723725504. Its totient is φ = 861862704.

The previous prime is 1256883143. The next prime is 1256883149. The reversal of 1256883145 is 5413886521.

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 1256883145 - 2¹ = 1256883143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256883143) 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, 17955439 + ... + 17955508.

It is an arithmetic number, because the mean of its divisors is an integer number (215465688).

Almost surely, 2^1256883145 is an apocalyptic number.

It is an amenable number.

1256883145 is a deficient number, since it is larger than the sum of its proper divisors (466842359).

1256883145 is an equidigital number, since it uses as much as digits as its factorization.

1256883145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35910959.

The product of its digits is 230400, while the sum is 43.

The square root of 1256883145 is about 35452.5477927892. The cubic root of 1256883145 is about 1079.1909650285.

The spelling of 1256883145 in words is "one billion, two hundred fifty-six million, eight hundred eighty-three thousand, one hundred forty-five".