256726101 has 4 divisors (see below), whose sum is σ = 342301472. Its totient is φ = 171150732.

The previous prime is 256726087. The next prime is 256726121. The reversal of 256726101 is 101627652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 256726101 - 2⁶ = 256726037 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 (256726121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42787681 + ... + 42787686.

It is an arithmetic number, because the mean of its divisors is an integer number (85575368).

Almost surely, 2^256726101 is an apocalyptic number.

It is an amenable number.

256726101 is a deficient number, since it is larger than the sum of its proper divisors (85575371).

256726101 is an equidigital number, since it uses as much as digits as its factorization.

256726101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85575370.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 256726101 is about 16022.6745894685. The cubic root of 256726101 is about 635.5601736381.

The spelling of 256726101 in words is "two hundred fifty-six million, seven hundred twenty-six thousand, one hundred one".