1340197 has 4 divisors (see below), whose sum is σ = 1343340. Its totient is φ = 1337056.

The previous prime is 1340179. The next prime is 1340221. The reversal of 1340197 is 7910431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7910431 = 281 ⋅28151.

It can be written as a sum of positive squares in 2 ways, for example, as 649636 + 690561 = 806^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340197 - 2⁷ = 1340069 is a prime.

It is a super-2 number, since 2×1340197² = 3592255997618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340107) 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, 808 + ... + 1825.

It is an arithmetic number, because the mean of its divisors is an integer number (335835).

2^1340197 is an apocalyptic number.

It is an amenable number.

1340197 is a deficient number, since it is larger than the sum of its proper divisors (3143).

1340197 is an equidigital number, since it uses as much as digits as its factorization.

1340197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1340197 is about 1157.6687781918. The cubic root of 1340197 is about 110.2527795502.

The spelling of 1340197 in words is "one million, three hundred forty thousand, one hundred ninety-seven".