201256123 has 4 divisors (see below), whose sum is σ = 207748288. Its totient is φ = 194763960.

The previous prime is 201256117. The next prime is 201256163. The reversal of 201256123 is 321652102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201256123 - 2²⁵ = 167701691 is a prime.

It is a super-2 number, since 2×201256123² = 81008054089982258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201256094 and 201256103.

It is not an unprimeable number, because it can be changed into a prime (201256163) 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, 3246036 + ... + 3246097.

It is an arithmetic number, because the mean of its divisors is an integer number (51937072).

Almost surely, 2^201256123 is an apocalyptic number.

201256123 is a deficient number, since it is larger than the sum of its proper divisors (6492165).

201256123 is an equidigital number, since it uses as much as digits as its factorization.

201256123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6492164.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 201256123 is about 14186.4767648631. The cubic root of 201256123 is about 586.0253020561.

The spelling of 201256123 in words is "two hundred one million, two hundred fifty-six thousand, one hundred twenty-three".