1497 has 4 divisors (see below), whose sum is σ = 2000. Its totient is φ = 996.
The previous prime is 1493. The next prime is 1499. The reversal of 1497 is 7941.
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: 7941 = 3 ⋅2647.
It is not a de Polignac number, because 1497 - 22 = 1493 is a prime.
It is a D-number.
It is a Duffinian number.
It is the 26-th Perrin number.
1497 is a lucky number.
It is a plaindrome in base 14 and base 15.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1497.
It is not an unprimeable number, because it can be changed into a prime (1493) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247 + ... + 252.
It is an arithmetic number, because the mean of its divisors is an integer number (500).
21497 is an apocalyptic number.
It is an amenable number.
1497 is a deficient number, since it is larger than the sum of its proper divisors (503).
1497 is an equidigital number, since it uses as much as digits as its factorization.
1497 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 502.
The product of its digits is 252, while the sum is 21.
The square root of 1497 is about 38.6910842443. The cubic root of 1497 is about 11.4395059040.
It can be divided in two parts, 14 and 97, that added together give a palindrome (111).
The spelling of 1497 in words is "one thousand, four hundred ninety-seven".
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