161254121 has 8 divisors (see below), whose sum is σ = 193990080. Its totient is φ = 130943088.

The previous prime is 161254117. The next prime is 161254151. The reversal of 161254121 is 121452161.

161254121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 161254121 - 2² = 161254117 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161254111) 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, 606086 + ... + 606351.

It is an arithmetic number, because the mean of its divisors is an integer number (24248760).

Almost surely, 2^161254121 is an apocalyptic number.

It is an amenable number.

161254121 is a deficient number, since it is larger than the sum of its proper divisors (32735959).

161254121 is a wasteful number, since it uses less digits than its factorization.

161254121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212463.

The product of its digits is 480, while the sum is 23.

The square root of 161254121 is about 12698.5873623801. The cubic root of 161254121 is about 544.2982534497.

The spelling of 161254121 in words is "one hundred sixty-one million, two hundred fifty-four thousand, one hundred twenty-one".