125821847 has 2 divisors, whose sum is σ = 125821848. Its totient is φ = 125821846.

The previous prime is 125821831. The next prime is 125821859. The reversal of 125821847 is 748128521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125821847 - 2⁴ = 125821831 is a prime.

It is a super-2 number, since 2×125821847² = 31662274364982818, 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 125821847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125821877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62910923 + 62910924.

It is an arithmetic number, because the mean of its divisors is an integer number (62910924).

Almost surely, 2^125821847 is an apocalyptic number.

125821847 is a deficient number, since it is larger than the sum of its proper divisors (1).

125821847 is an equidigital number, since it uses as much as digits as its factorization.

125821847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 38.

The square root of 125821847 is about 11217.0337879495. The cubic root of 125821847 is about 501.0934031960.

The spelling of 125821847 in words is "one hundred twenty-five million, eight hundred twenty-one thousand, eight hundred forty-seven".