125821151 has 2 divisors, whose sum is σ = 125821152. Its totient is φ = 125821150.

The previous prime is 125821147. The next prime is 125821181. The reversal of 125821151 is 151128521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125821151 - 2² = 125821147 is a prime.

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 125821151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125821141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62910575 + 62910576.

It is an arithmetic number, because the mean of its divisors is an integer number (62910576).

Almost surely, 2^125821151 is an apocalyptic number.

125821151 is a deficient number, since it is larger than the sum of its proper divisors (1).

125821151 is an equidigital number, since it uses as much as digits as its factorization.

125821151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 26.

The square root of 125821151 is about 11217.0027636620. The cubic root of 125821151 is about 501.0924792397.

Adding to 125821151 its reverse (151128521), we get a palindrome (276949672).

The spelling of 125821151 in words is "one hundred twenty-five million, eight hundred twenty-one thousand, one hundred fifty-one".