125471421 has 12 divisors (see below), whose sum is σ = 190775520. Its totient is φ = 79245000.

The previous prime is 125471419. The next prime is 125471431. The reversal of 125471421 is 124174521.

It is not a de Polignac number, because 125471421 - 2¹ = 125471419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125471431) 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 11 ways as a sum of consecutive naturals, for example, 366705 + ... + 367046.

It is an arithmetic number, because the mean of its divisors is an integer number (15897960).

Almost surely, 2^125471421 is an apocalyptic number.

It is an amenable number.

125471421 is a deficient number, since it is larger than the sum of its proper divisors (65304099).

125471421 is a wasteful number, since it uses less digits than its factorization.

125471421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733776 (or 733773 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 125471421 is about 11201.4026353846. The cubic root of 125471421 is about 500.6277728061.

The spelling of 125471421 in words is "one hundred twenty-five million, four hundred seventy-one thousand, four hundred twenty-one".