1397747 has 8 divisors (see below), whose sum is σ = 1525440. Its totient is φ = 1272960.

The previous prime is 1397743. The next prime is 1397761. The reversal of 1397747 is 7477931.

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

It is not a de Polignac number, because 1397747 - 2² = 1397743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397747.

It is not an unprimeable number, because it can be changed into a prime (1397743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (190680).

2^1397747 is an apocalyptic number.

1397747 is a deficient number, since it is larger than the sum of its proper divisors (127693).

1397747 is a wasteful number, since it uses less digits than its factorization.

1397747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453.

The product of its digits is 37044, while the sum is 38.

The square root of 1397747 is about 1182.2635070068. The cubic root of 1397747 is about 111.8088523173.

The spelling of 1397747 in words is "one million, three hundred ninety-seven thousand, seven hundred forty-seven".