125001311 has 4 divisors (see below), whose sum is σ = 125067912. Its totient is φ = 124934712.

The previous prime is 125001307. The next prime is 125001313. The reversal of 125001311 is 113100521.

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 125001311 - 2² = 125001307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125001313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30401 + ... + 34266.

It is an arithmetic number, because the mean of its divisors is an integer number (31266978).

Almost surely, 2^125001311 is an apocalyptic number.

125001311 is a deficient number, since it is larger than the sum of its proper divisors (66601).

125001311 is an equidigital number, since it uses as much as digits as its factorization.

125001311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66600.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 125001311 is about 11180.3985170476. The cubic root of 125001311 is about 500.0017479939.

Adding to 125001311 its reverse (113100521), we get a palindrome (238101832).

The spelling of 125001311 in words is "one hundred twenty-five million, one thousand, three hundred eleven".