125593721 has 4 divisors (see below), whose sum is σ = 137011344. Its totient is φ = 114176100.

The previous prime is 125593717. The next prime is 125593723. The reversal of 125593721 is 127395521.

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 125593721 - 2² = 125593717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125593723) 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, 5708795 + ... + 5708816.

It is an arithmetic number, because the mean of its divisors is an integer number (34252836).

Almost surely, 2^125593721 is an apocalyptic number.

125593721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125593721 is a deficient number, since it is larger than the sum of its proper divisors (11417623).

125593721 is a wasteful number, since it uses less digits than its factorization.

125593721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11417622.

The product of its digits is 18900, while the sum is 35.

The square root of 125593721 is about 11206.8604434962. The cubic root of 125593721 is about 500.7903779471.

The spelling of 125593721 in words is "one hundred twenty-five million, five hundred ninety-three thousand, seven hundred twenty-one".