16121453 has 2 divisors, whose sum is σ = 16121454. Its totient is φ = 16121452.

The previous prime is 16121449. The next prime is 16121461. The reversal of 16121453 is 35412161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 3433609 = 3562^2 + 1853^2 .

It is a cyclic number.

It is not a de Polignac number, because 16121453 - 2² = 16121449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16121753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060726 + 8060727.

It is an arithmetic number, because the mean of its divisors is an integer number (8060727).

Almost surely, 2^16121453 is an apocalyptic number.

It is an amenable number.

16121453 is a deficient number, since it is larger than the sum of its proper divisors (1).

16121453 is an equidigital number, since it uses as much as digits as its factorization.

16121453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 16121453 is about 4015.1529236132. The cubic root of 16121453 is about 252.6201917740.

The spelling of 16121453 in words is "sixteen million, one hundred twenty-one thousand, four hundred fifty-three".