16156121 has 8 divisors (see below), whose sum is σ = 16458624. Its totient is φ = 15855840.

The previous prime is 16156093. The next prime is 16156157. The reversal of 16156121 is 12165161.

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 16156121 - 2⁶ = 16156057 is a prime.

It is a super-2 number, since 2×16156121² = 522040491533282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16156181) 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, 21860 + ... + 22586.

It is an arithmetic number, because the mean of its divisors is an integer number (2057328).

Almost surely, 2^16156121 is an apocalyptic number.

It is an amenable number.

16156121 is a deficient number, since it is larger than the sum of its proper divisors (302503).

16156121 is an equidigital number, since it uses as much as digits as its factorization.

16156121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its digits is 360, while the sum is 23.

The square root of 16156121 is about 4019.4677508347. The cubic root of 16156121 is about 252.8011425151.

The spelling of 16156121 in words is "sixteen million, one hundred fifty-six thousand, one hundred twenty-one".