1997247 has 8 divisors (see below), whose sum is σ = 3043456. Its totient is φ = 1141272.

The previous prime is 1997243. The next prime is 1997257. The reversal of 1997247 is 7427991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1997247 - 2² = 1997243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47533 + ... + 47574.

It is an arithmetic number, because the mean of its divisors is an integer number (380432).

2^1997247 is an apocalyptic number.

1997247 is a deficient number, since it is larger than the sum of its proper divisors (1046209).

1997247 is an equidigital number, since it uses as much as digits as its factorization.

1997247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95117.

The product of its digits is 31752, while the sum is 39.

The square root of 1997247 is about 1413.2398947100. The cubic root of 1997247 is about 125.9342690668.

The spelling of 1997247 in words is "one million, nine hundred ninety-seven thousand, two hundred forty-seven".