16725451 has 4 divisors (see below), whose sum is σ = 16772400. Its totient is φ = 16678504.

The previous prime is 16725437. The next prime is 16725463. The reversal of 16725451 is 15452761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15452761 = 3931².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16725451 is a prime.

It is a super-2 number, since 2×16725451² = 559481422306802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16725421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22936 + ... + 23653.

It is an arithmetic number, because the mean of its divisors is an integer number (4193100).

Almost surely, 2^16725451 is an apocalyptic number.

16725451 is a deficient number, since it is larger than the sum of its proper divisors (46949).

16725451 is an equidigital number, since it uses as much as digits as its factorization.

16725451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46948.

The product of its digits is 8400, while the sum is 31.

The square root of 16725451 is about 4089.6761485477. The cubic root of 16725451 is about 255.7364383412.

The spelling of 16725451 in words is "sixteen million, seven hundred twenty-five thousand, four hundred fifty-one".