125681443 has 2 divisors, whose sum is σ = 125681444. Its totient is φ = 125681442.

The previous prime is 125681419. The next prime is 125681461. The reversal of 125681443 is 344186521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125681443 - 2⁹ = 125680931 is a prime.

It is a super-2 number, since 2×125681443² = 31591650229124498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125681399 and 125681408.

It is not a weakly prime, because it can be changed into another prime (125688443) 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 as a sum of consecutive naturals, namely, 62840721 + 62840722.

It is an arithmetic number, because the mean of its divisors is an integer number (62840722).

Almost surely, 2^125681443 is an apocalyptic number.

125681443 is a deficient number, since it is larger than the sum of its proper divisors (1).

125681443 is an equidigital number, since it uses as much as digits as its factorization.

125681443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

The square root of 125681443 is about 11210.7735237137. The cubic root of 125681443 is about 500.9069445751.

The spelling of 125681443 in words is "one hundred twenty-five million, six hundred eighty-one thousand, four hundred forty-three".