125000161 has 8 divisors (see below), whose sum is σ = 146853504. Its totient is φ = 104895120.

The previous prime is 125000159. The next prime is 125000203. The reversal of 125000161 is 161000521.

125000161 = 3366² + 3367² + ... + 3376².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125000161 - 2¹ = 125000159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125000461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436921 + ... + 437206.

It is an arithmetic number, because the mean of its divisors is an integer number (18356688).

Almost surely, 2^125000161 is an apocalyptic number.

125000161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125000161 is a deficient number, since it is larger than the sum of its proper divisors (21853343).

125000161 is a wasteful number, since it uses less digits than its factorization.

125000161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874151.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 125000161 is about 11180.3470876355. The cubic root of 125000161 is about 500.0002146666. Note that the first 3 decimals are identical.

Adding to 125000161 its reverse (161000521), we get a palindrome (286000682).

The spelling of 125000161 in words is "one hundred twenty-five million, one hundred sixty-one", and thus it is an aban number.