16457 has 4 divisors (see below), whose sum is σ = 18816. Its totient is φ = 14100.
The previous prime is 16453. The next prime is 16477. The reversal of 16457 is 75461.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75461 = 59 ⋅1279.
It is a cyclic number.
It is not a de Polignac number, because 16457 - 22 = 16453 is a prime.
It is not an unprimeable number, because it can be changed into a prime (16451) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169 + ... + 1182.
It is an arithmetic number, because the mean of its divisors is an integer number (4704).
216457 is an apocalyptic number.
It is an amenable number.
16457 is a deficient number, since it is larger than the sum of its proper divisors (2359).
16457 is an equidigital number, since it uses as much as digits as its factorization.
16457 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2358.
The product of its digits is 840, while the sum is 23.
The square root of 16457 is about 128.2848393225. The cubic root of 16457 is about 25.4360823906.
The spelling of 16457 in words is "sixteen thousand, four hundred fifty-seven".
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