125603621 has 16 divisors (see below), whose sum is σ = 153982080. Its totient is φ = 100816320.

The previous prime is 125603617. The next prime is 125603629. The reversal of 125603621 is 126306521.

It is not a de Polignac number, because 125603621 - 2² = 125603617 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 (125603629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15806 + ... + 22383.

It is an arithmetic number, because the mean of its divisors is an integer number (9623880).

Almost surely, 2^125603621 is an apocalyptic number.

125603621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125603621 is a deficient number, since it is larger than the sum of its proper divisors (28378459).

125603621 is a wasteful number, since it uses less digits than its factorization.

125603621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38236.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 125603621 is about 11207.3021285232. The cubic root of 125603621 is about 500.8035359681.

The spelling of 125603621 in words is "one hundred twenty-five million, six hundred three thousand, six hundred twenty-one".