256601121 has 8 divisors (see below), whose sum is σ = 391011264. Its totient is φ = 146629200.

The previous prime is 256601113. The next prime is 256601123. The reversal of 256601121 is 121106652.

256601121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 256601121 - 2³ = 256601113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256601091 and 256601100.

It is not an unprimeable number, because it can be changed into a prime (256601123) 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, 6109530 + ... + 6109571.

It is an arithmetic number, because the mean of its divisors is an integer number (48876408).

Almost surely, 2^256601121 is an apocalyptic number.

256601121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

256601121 is a deficient number, since it is larger than the sum of its proper divisors (134410143).

256601121 is a wasteful number, since it uses less digits than its factorization.

256601121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12219111.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 256601121 is about 16018.7740167592. The cubic root of 256601121 is about 635.4570219348.

Adding to 256601121 its reverse (121106652), we get a palindrome (377707773).

The spelling of 256601121 in words is "two hundred fifty-six million, six hundred one thousand, one hundred twenty-one".