125500451 has 2 divisors, whose sum is σ = 125500452. Its totient is φ = 125500450.

The previous prime is 125500327. The next prime is 125500457. The reversal of 125500451 is 154005521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125500451 - 2²² = 121306147 is a prime.

It is equal to p_7137005 and since 125500451 and 7137005 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (125500457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62750225 + 62750226.

It is an arithmetic number, because the mean of its divisors is an integer number (62750226).

Almost surely, 2^125500451 is an apocalyptic number.

125500451 is a deficient number, since it is larger than the sum of its proper divisors (1).

125500451 is an equidigital number, since it uses as much as digits as its factorization.

125500451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 125500451 is about 11202.6983803011. The cubic root of 125500451 is about 500.6663794822. Note that the first 3 decimals are identical.

Adding to 125500451 its reverse (154005521), we get a palindrome (279505972).

The spelling of 125500451 in words is "one hundred twenty-five million, five hundred thousand, four hundred fifty-one".