125199421 has 8 divisors (see below), whose sum is σ = 129519104. Its totient is φ = 120897360.

The previous prime is 125199413. The next prime is 125199439. The reversal of 125199421 is 124991521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125199421 - 2³ = 125199413 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 (125199461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10951 + ... + 19243.

It is an arithmetic number, because the mean of its divisors is an integer number (16189888).

Almost surely, 2^125199421 is an apocalyptic number.

It is an amenable number.

125199421 is a deficient number, since it is larger than the sum of its proper divisors (4319683).

125199421 is an equidigital number, since it uses as much as digits as its factorization.

125199421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8811.

The product of its digits is 6480, while the sum is 34.

The square root of 125199421 is about 11189.2547115525. The cubic root of 125199421 is about 500.2657533919.

The spelling of 125199421 in words is "one hundred twenty-five million, one hundred ninety-nine thousand, four hundred twenty-one".