125400851 has 2 divisors, whose sum is σ = 125400852. Its totient is φ = 125400850.

The previous prime is 125400829. The next prime is 125400871. The reversal of 125400851 is 158004521.

It is a strong prime.

It is an emirp because it is prime and its reverse (158004521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125400851 is a prime.

It is a Chen prime.

It is equal to p_7131671 and since 125400851 and 7131671 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125400851.

It is not a weakly prime, because it can be changed into another prime (125400871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62700425 + 62700426.

It is an arithmetic number, because the mean of its divisors is an integer number (62700426).

Almost surely, 2^125400851 is an apocalyptic number.

125400851 is a deficient number, since it is larger than the sum of its proper divisors (1).

125400851 is an equidigital number, since it uses as much as digits as its factorization.

125400851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 125400851 is about 11198.2521404012. The cubic root of 125400851 is about 500.5338977036.

The spelling of 125400851 in words is "one hundred twenty-five million, four hundred thousand, eight hundred fifty-one".