247497 has 4 divisors (see below), whose sum is σ = 330000. Its totient is φ = 164996.

The previous prime is 247463. The next prime is 247501. The reversal of 247497 is 794742.

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.

It is a cyclic number.

It is not a de Polignac number, because 247497 - 2⁶ = 247433 is a prime.

It is a super-2 number, since 2×247497² = 122509530018, which contains 22 as substring.

It is a D-number.

247497 is a lucky number.

It is a nialpdrome in base 8 and base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247497.

It is not an unprimeable number, because it can be changed into a prime (247697) 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, 41247 + ... + 41252.

It is an arithmetic number, because the mean of its divisors is an integer number (82500).

2²⁴⁷⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

247497 is a deficient number, since it is larger than the sum of its proper divisors (82503).

247497 is an equidigital number, since it uses as much as digits as its factorization.

247497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82502.

The product of its digits is 14112, while the sum is 33.

The square root of 247497 is about 497.4907034307. The cubic root of 247497 is about 62.7851081029.

The spelling of 247497 in words is "two hundred forty-seven thousand, four hundred ninety-seven".