125545553 has 16 divisors (see below), whose sum is σ = 149592960. Its totient is φ = 103084800.

The previous prime is 125545549. The next prime is 125545573. The reversal of 125545553 is 355545521.

It is not a de Polignac number, because 125545553 - 2² = 125545549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125545543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24233 + ... + 28953.

It is an arithmetic number, because the mean of its divisors is an integer number (9349560).

Almost surely, 2^125545553 is an apocalyptic number.

It is an amenable number.

125545553 is a deficient number, since it is larger than the sum of its proper divisors (24047407).

125545553 is a wasteful number, since it uses less digits than its factorization.

125545553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888.

The product of its digits is 75000, while the sum is 35.

The square root of 125545553 is about 11204.7111966351. The cubic root of 125545553 is about 500.7263483253.

The spelling of 125545553 in words is "one hundred twenty-five million, five hundred forty-five thousand, five hundred fifty-three".