161226625 has 16 divisors (see below), whose sum is σ = 229956480. Its totient is φ = 110554800.

The previous prime is 161226607. The next prime is 161226641. The reversal of 161226625 is 526622161.

It is not a de Polignac number, because 161226625 - 2²³ = 152838017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91255 + ... + 93004.

It is an arithmetic number, because the mean of its divisors is an integer number (14372280).

Almost surely, 2^161226625 is an apocalyptic number.

It is an amenable number.

161226625 is a deficient number, since it is larger than the sum of its proper divisors (68729855).

161226625 is an equidigital number, since it uses as much as digits as its factorization.

161226625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184281 (or 184271 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 161226625 is about 12697.5046761165. The cubic root of 161226625 is about 544.2673149629.

Adding to 161226625 its reverse (526622161), we get a palindrome (687848786).

The spelling of 161226625 in words is "one hundred sixty-one million, two hundred twenty-six thousand, six hundred twenty-five".