125139851 has 2 divisors, whose sum is σ = 125139852. Its totient is φ = 125139850.

The previous prime is 125139829. The next prime is 125139857. The reversal of 125139851 is 158931521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125139851 is a prime.

It is not a weakly prime, because it can be changed into another prime (125139857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62569925 + 62569926.

It is an arithmetic number, because the mean of its divisors is an integer number (62569926).

Almost surely, 2^125139851 is an apocalyptic number.

125139851 is a deficient number, since it is larger than the sum of its proper divisors (1).

125139851 is an equidigital number, since it uses as much as digits as its factorization.

125139851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The square root of 125139851 is about 11186.5924659836. The cubic root of 125139851 is about 500.1863985026.

The spelling of 125139851 in words is "one hundred twenty-five million, one hundred thirty-nine thousand, eight hundred fifty-one".