125181321 has 4 divisors (see below), whose sum is σ = 166908432. Its totient is φ = 83454212.

The previous prime is 125181311. The next prime is 125181337. The reversal of 125181321 is 123181521.

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 a cyclic number.

It is not a de Polignac number, because 125181321 - 2¹⁵ = 125148553 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125181291 and 125181300.

It is not an unprimeable number, because it can be changed into a prime (125181311) 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, 20863551 + ... + 20863556.

It is an arithmetic number, because the mean of its divisors is an integer number (41727108).

Almost surely, 2^125181321 is an apocalyptic number.

It is an amenable number.

125181321 is a deficient number, since it is larger than the sum of its proper divisors (41727111).

125181321 is an equidigital number, since it uses as much as digits as its factorization.

125181321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41727110.

The product of its digits is 480, while the sum is 24.

The square root of 125181321 is about 11188.4458706292. The cubic root of 125181321 is about 500.2416445304.

The spelling of 125181321 in words is "one hundred twenty-five million, one hundred eighty-one thousand, three hundred twenty-one".