1243897 has 8 divisors (see below), whose sum is σ = 1310400. Its totient is φ = 1179024.

The previous prime is 1243889. The next prime is 1243927. The reversal of 1243897 is 7983421.

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

It is not a de Polignac number, because 1243897 - 2³ = 1243889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243807) 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, 1348 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (163800).

2^1243897 is an apocalyptic number.

It is an amenable number.

1243897 is a deficient number, since it is larger than the sum of its proper divisors (66503).

1243897 is an equidigital number, since it uses as much as digits as its factorization.

1243897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its digits is 12096, while the sum is 34.

The square root of 1243897 is about 1115.3013045810. The cubic root of 1243897 is about 107.5461348761.

The spelling of 1243897 in words is "one million, two hundred forty-three thousand, eight hundred ninety-seven".