123156801 has 8 divisors (see below), whose sum is σ = 182454560. Its totient is φ = 82104516.

The previous prime is 123156793. The next prime is 123156821. The reversal of 123156801 is 108651321.

It is not a de Polignac number, because 123156801 - 2³ = 123156793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4561363 = 123156801 / (1 + 2 + 3 + 1 + 5 + 6 + 8 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123156821) 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, 2280655 + ... + 2280708.

It is an arithmetic number, because the mean of its divisors is an integer number (22806820).

Almost surely, 2^123156801 is an apocalyptic number.

It is an amenable number.

123156801 is a deficient number, since it is larger than the sum of its proper divisors (59297759).

123156801 is an equidigital number, since it uses as much as digits as its factorization.

123156801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4561372 (or 4561366 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 123156801 is about 11097.6033899216. The cubic root of 123156801 is about 497.5302218116.

The spelling of 123156801 in words is "one hundred twenty-three million, one hundred fifty-six thousand, eight hundred one".