1340997 has 8 divisors (see below), whose sum is σ = 2043456. Its totient is φ = 766272.

The previous prime is 1340981. The next prime is 1341007. The reversal of 1340997 is 7990431.

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

It is not a de Polignac number, because 1340997 - 2⁴ = 1340981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340947) 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, 31908 + ... + 31949.

It is an arithmetic number, because the mean of its divisors is an integer number (255432).

2^1340997 is an apocalyptic number.

It is an amenable number.

1340997 is a deficient number, since it is larger than the sum of its proper divisors (702459).

1340997 is an equidigital number, since it uses as much as digits as its factorization.

1340997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63867.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1340997 is about 1158.0142486170. The cubic root of 1340997 is about 110.2747128131.

Subtracting from 1340997 its sum of digits (33), we obtain a square (1340964 = 1158²).

The spelling of 1340997 in words is "one million, three hundred forty thousand, nine hundred ninety-seven".