125473681 has 2 divisors, whose sum is σ = 125473682. Its totient is φ = 125473680.

The previous prime is 125473669. The next prime is 125473703. The reversal of 125473681 is 186374521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64883025 + 60590656 = 8055^2 + 7784^2 .

It is an emirp because it is prime and its reverse (186374521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125473681 - 2⁷ = 125473553 is a prime.

It is a super-2 number, since 2×125473681² = 31487289247379522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125473681.

It is not a weakly prime, because it can be changed into another prime (125473661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62736840 + 62736841.

It is an arithmetic number, because the mean of its divisors is an integer number (62736841).

Almost surely, 2^125473681 is an apocalyptic number.

It is an amenable number.

125473681 is a deficient number, since it is larger than the sum of its proper divisors (1).

125473681 is an equidigital number, since it uses as much as digits as its factorization.

125473681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 125473681 is about 11201.5035151537. The cubic root of 125473681 is about 500.6307785688.

The spelling of 125473681 in words is "one hundred twenty-five million, four hundred seventy-three thousand, six hundred eighty-one".