9125551 has 4 divisors (see below), whose sum is σ = 9149400. Its totient is φ = 9101704.

The previous prime is 9125531. The next prime is 9125561. The reversal of 9125551 is 1555219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1555219 = 113 ⋅13763.

It is a cyclic number.

It is not a de Polignac number, because 9125551 - 2⁷ = 9125423 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 (9125521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11341 + ... + 12118.

It is an arithmetic number, because the mean of its divisors is an integer number (2287350).

Almost surely, 2^9125551 is an apocalyptic number.

9125551 is a deficient number, since it is larger than the sum of its proper divisors (23849).

9125551 is a wasteful number, since it uses less digits than its factorization.

9125551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23848.

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

The square root of 9125551 is about 3020.8526941908. The cubic root of 9125551 is about 208.9711657908.

The spelling of 9125551 in words is "nine million, one hundred twenty-five thousand, five hundred fifty-one".