125210551 has 16 divisors (see below), whose sum is σ = 138378240. Its totient is φ = 112764960.

The previous prime is 125210531. The next prime is 125210557. The reversal of 125210551 is 155012521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125210551 - 2¹³ = 125202359 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 (125210557) 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 15 ways as a sum of consecutive naturals, for example, 78306 + ... + 79888.

It is an arithmetic number, because the mean of its divisors is an integer number (8648640).

Almost surely, 2^125210551 is an apocalyptic number.

125210551 is a deficient number, since it is larger than the sum of its proper divisors (13167689).

125210551 is a wasteful number, since it uses less digits than its factorization.

125210551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 125210551 is about 11189.7520526596. The cubic root of 125210551 is about 500.2805771901.

The spelling of 125210551 in words is "one hundred twenty-five million, two hundred ten thousand, five hundred fifty-one".