125161951 has 4 divisors (see below), whose sum is σ = 127283400. Its totient is φ = 123040504.

The previous prime is 125161943. The next prime is 125161957. The reversal of 125161951 is 159161521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125161951 - 2³ = 125161943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125161957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060636 + ... + 1060753.

It is an arithmetic number, because the mean of its divisors is an integer number (31820850).

Almost surely, 2^125161951 is an apocalyptic number.

125161951 is a deficient number, since it is larger than the sum of its proper divisors (2121449).

125161951 is an equidigital number, since it uses as much as digits as its factorization.

125161951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121448.

The product of its digits is 2700, while the sum is 31.

The square root of 125161951 is about 11187.5802120030. The cubic root of 125161951 is about 500.2158414782.

The spelling of 125161951 in words is "one hundred twenty-five million, one hundred sixty-one thousand, nine hundred fifty-one".