125734021 has 8 divisors (see below), whose sum is σ = 147038144. Its totient is φ = 105265440.

The previous prime is 125734013. The next prime is 125734027. The reversal of 125734021 is 120437521.

It is a happy number.

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

It is not a de Polignac number, because 125734021 - 2³ = 125734013 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 (125734027) 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, 208560 + ... + 209161.

It is an arithmetic number, because the mean of its divisors is an integer number (18379768).

Almost surely, 2^125734021 is an apocalyptic number.

It is an amenable number.

125734021 is a deficient number, since it is larger than the sum of its proper divisors (21304123).

125734021 is an equidigital number, since it uses as much as digits as its factorization.

125734021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417771.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 125734021 is about 11213.1182549726. The cubic root of 125734021 is about 500.9767852054.

The spelling of 125734021 in words is "one hundred twenty-five million, seven hundred thirty-four thousand, twenty-one".