123187801 has 9 divisors (see below), whose sum is σ = 135539103. Its totient is φ = 111877920.

The previous prime is 123187721. The next prime is 123187807. The reversal of 123187801 is 108781321.

It is a happy number.

The square root of 123187801 is 11099.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 37810201 + 85377600 = 6149^2 + 9240^2 .

It is not a de Polignac number, because 123187801 - 2¹¹ = 123185753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123187807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 121585 + ... + 122593.

Almost surely, 2^123187801 is an apocalyptic number.

123187801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123187801 is the 11099-th square number.

123187801 is the 5550-th centered octagonal number.

It is an amenable number.

123187801 is a deficient number, since it is larger than the sum of its proper divisors (12351302).

123187801 is an frugal number, since it uses more digits than its factorization.

123187801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The cubic root of 123187801 is about 497.5719630251.

It can be divided in two parts, 12 and 3187801, that added together give a palindrome (3187813).

The spelling of 123187801 in words is "one hundred twenty-three million, one hundred eighty-seven thousand, eight hundred one".