125989481 has 2 divisors, whose sum is σ = 125989482. Its totient is φ = 125989480.

The previous prime is 125989453. The next prime is 125989511. The reversal of 125989481 is 184989521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 50993881 = 8660^2 + 7141^2 .

It is a cyclic number.

It is not a de Polignac number, because 125989481 - 2²⁶ = 58880617 is a prime.

It is a super-2 number, since 2×125989481² = 31746698645298722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125919481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62994740 + 62994741.

It is an arithmetic number, because the mean of its divisors is an integer number (62994741).

Almost surely, 2^125989481 is an apocalyptic number.

It is an amenable number.

125989481 is a deficient number, since it is larger than the sum of its proper divisors (1).

125989481 is an equidigital number, since it uses as much as digits as its factorization.

125989481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 47.

The square root of 125989481 is about 11224.5035970416. The cubic root of 125989481 is about 501.3158420815.

The spelling of 125989481 in words is "one hundred twenty-five million, nine hundred eighty-nine thousand, four hundred eighty-one".