16121976 has 32 divisors (see below), whose sum is σ = 43406160. Its totient is φ = 4960512.

The previous prime is 16121971. The next prime is 16122037. The reversal of 16121976 is 67912161.

It is a super-2 number, since 2×16121976² = 519836220289152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121971) 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, 25525 + ... + 26148.

Almost surely, 2^16121976 is an apocalyptic number.

It is an amenable number.

16121976 is an abundant number, since it is smaller than the sum of its proper divisors (27284184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16121976 is a wasteful number, since it uses less digits than its factorization.

16121976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51695 (or 51691 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 16121976 is about 4015.2180513641. The cubic root of 16121976 is about 252.6229235156.

The spelling of 16121976 in words is "sixteen million, one hundred twenty-one thousand, nine hundred seventy-six".