125421693 has 4 divisors (see below), whose sum is σ = 167228928. Its totient is φ = 83614460.

The previous prime is 125421689. The next prime is 125421721. The reversal of 125421693 is 396124521.

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 125421693 - 2² = 125421689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125421643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20903613 + ... + 20903618.

It is an arithmetic number, because the mean of its divisors is an integer number (41807232).

Almost surely, 2^125421693 is an apocalyptic number.

It is an amenable number.

125421693 is a deficient number, since it is larger than the sum of its proper divisors (41807235).

125421693 is an equidigital number, since it uses as much as digits as its factorization.

125421693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41807234.

The product of its digits is 12960, while the sum is 33.

The square root of 125421693 is about 11199.1826933933. The cubic root of 125421693 is about 500.5616262490.

The spelling of 125421693 in words is "one hundred twenty-five million, four hundred twenty-one thousand, six hundred ninety-three".