125543521 has 8 divisors (see below), whose sum is σ = 137217024. Its totient is φ = 114346560.

The previous prime is 125543519. The next prime is 125543527. The reversal of 125543521 is 125345521.

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 125543521 - 2¹ = 125543519 is a prime.

It is a super-2 number, since 2×125543521² = 31522351330154882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125543521.

It is not an unprimeable number, because it can be changed into a prime (125543527) 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, 118585 + ... + 119638.

It is an arithmetic number, because the mean of its divisors is an integer number (17152128).

Almost surely, 2^125543521 is an apocalyptic number.

It is an amenable number.

125543521 is a deficient number, since it is larger than the sum of its proper divisors (11673503).

125543521 is a wasteful number, since it uses less digits than its factorization.

125543521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238271.

The product of its digits is 6000, while the sum is 28.

The square root of 125543521 is about 11204.6205201247. The cubic root of 125543521 is about 500.7236468319.

The spelling of 125543521 in words is "one hundred twenty-five million, five hundred forty-three thousand, five hundred twenty-one".