125521545 has 8 divisors (see below), whose sum is σ = 200834496. Its totient is φ = 66944816.

The previous prime is 125521519. The next prime is 125521547. The reversal of 125521545 is 545125521.

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 125521545 - 2⁸ = 125521289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125521547) 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, 4184037 + ... + 4184066.

It is an arithmetic number, because the mean of its divisors is an integer number (25104312).

Almost surely, 2^125521545 is an apocalyptic number.

125521545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125521545 is a deficient number, since it is larger than the sum of its proper divisors (75312951).

125521545 is an equidigital number, since it uses as much as digits as its factorization.

125521545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368111.

The product of its digits is 10000, while the sum is 30.

The square root of 125521545 is about 11203.6398103473. The cubic root of 125521545 is about 500.6944284252.

The spelling of 125521545 in words is "one hundred twenty-five million, five hundred twenty-one thousand, five hundred forty-five".