125009551 has 6 divisors (see below), whose sum is σ = 132795920. Its totient is φ = 117655776.

The previous prime is 125009543. The next prime is 125009561. The reversal of 125009551 is 155900521.

It is not a de Polignac number, because 125009551 - 2³ = 125009543 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 (125009561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215991 + ... + 216568.

Almost surely, 2^125009551 is an apocalyptic number.

125009551 is a deficient number, since it is larger than the sum of its proper divisors (7786369).

125009551 is an equidigital number, since it uses as much as digits as its factorization.

125009551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432593 (or 432576 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 125009551 is about 11180.7670130452. The cubic root of 125009551 is about 500.0127343423.

The spelling of 125009551 in words is "one hundred twenty-five million, nine thousand, five hundred fifty-one".