125510001 has 16 divisors (see below), whose sum is σ = 171268800. Its totient is φ = 81731520.

The previous prime is 125509987. The next prime is 125510003. The reversal of 125510001 is 100015521.

It is not a de Polignac number, because 125510001 - 2¹³ = 125501809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125510003) 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, 24966 + ... + 29568.

It is an arithmetic number, because the mean of its divisors is an integer number (10704300).

Almost surely, 2^125510001 is an apocalyptic number.

It is an amenable number.

125510001 is a deficient number, since it is larger than the sum of its proper divisors (45758799).

125510001 is a wasteful number, since it uses less digits than its factorization.

125510001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 125510001 is about 11203.1246087866. The cubic root of 125510001 is about 500.6790786202.

Adding to 125510001 its reverse (100015521), we get a palindrome (225525522).

The spelling of 125510001 in words is "one hundred twenty-five million, five hundred ten thousand, one".