1397671 has 6 divisors (see below), whose sum is σ = 1536416. Its totient is φ = 1270500.

The previous prime is 1397657. The next prime is 1397681. The reversal of 1397671 is 1767931.

It is a happy number.

It is not a de Polignac number, because 1397671 - 2⁹ = 1397159 is a prime.

It is a Duffinian number.

1397671 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5655 + ... + 5896.

2^1397671 is an apocalyptic number.

1397671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1397671 is a deficient number, since it is larger than the sum of its proper divisors (138745).

1397671 is a wasteful number, since it uses less digits than its factorization.

1397671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11573 (or 11562 counting only the distinct ones).

The product of its digits is 7938, while the sum is 34.

The square root of 1397671 is about 1182.2313648352. The cubic root of 1397671 is about 111.8068258116.

The spelling of 1397671 in words is "one million, three hundred ninety-seven thousand, six hundred seventy-one".