256241447 has 8 divisors (see below), whose sum is σ = 319469952. Its totient is φ = 199668600.

The previous prime is 256241441. The next prime is 256241449. The reversal of 256241447 is 744142652.

It is a happy number.

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 256241447 - 2⁸ = 256241191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256241441) 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, 1663829 + ... + 1663982.

It is an arithmetic number, because the mean of its divisors is an integer number (39933744).

Almost surely, 2^256241447 is an apocalyptic number.

256241447 is a deficient number, since it is larger than the sum of its proper divisors (63228505).

256241447 is a wasteful number, since it uses less digits than its factorization.

256241447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327829.

The product of its digits is 53760, while the sum is 35.

The square root of 256241447 is about 16007.5434405158. The cubic root of 256241447 is about 635.1599795320.

The spelling of 256241447 in words is "two hundred fifty-six million, two hundred forty-one thousand, four hundred forty-seven".