125836406243 has 2 divisors, whose sum is σ = 125836406244. Its totient is φ = 125836406242.

The previous prime is 125836406233. The next prime is 125836406317. The reversal of 125836406243 is 342604638521.

It is a weak prime.

It is an emirp because it is prime and its reverse (342604638521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125836406243 - 2²⁰ = 125835357667 is a prime.

It is a super-2 number, since 2×125836406243² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 125836406194 and 125836406203.

It is not a weakly prime, because it can be changed into another prime (125836406233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62918203121 + 62918203122.

It is an arithmetic number, because the mean of its divisors is an integer number (62918203122).

Almost surely, 2^125836406243 is an apocalyptic number.

125836406243 is a deficient number, since it is larger than the sum of its proper divisors (1).

125836406243 is an equidigital number, since it uses as much as digits as its factorization.

125836406243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 125836406243 in words is "one hundred twenty-five billion, eight hundred thirty-six million, four hundred six thousand, two hundred forty-three".