16012981 has 2 divisors, whose sum is σ = 16012982. Its totient is φ = 16012980.

The previous prime is 16012973. The next prime is 16012987. The reversal of 16012981 is 18921061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 7890481 = 2850^2 + 2809^2 .

It is a cyclic number.

It is not a de Polignac number, because 16012981 - 2³ = 16012973 is a prime.

It is a super-2 number, since 2×16012981² = 512831121012722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16012987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8006490 + 8006491.

It is an arithmetic number, because the mean of its divisors is an integer number (8006491).

Almost surely, 2^16012981 is an apocalyptic number.

It is an amenable number.

16012981 is a deficient number, since it is larger than the sum of its proper divisors (1).

16012981 is an equidigital number, since it uses as much as digits as its factorization.

16012981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 16012981 is about 4001.6222960195. The cubic root of 16012981 is about 252.0523375378.

The spelling of 16012981 in words is "sixteen million, twelve thousand, nine hundred eighty-one".