1397340 has 72 divisors (see below), whose sum is σ = 4848480. Its totient is φ = 319104.

The previous prime is 1397339. The next prime is 1397359. The reversal of 1397340 is 437931.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 706 + ... + 1814.

It is an arithmetic number, because the mean of its divisors is an integer number (67340).

2^1397340 is an apocalyptic number.

1397340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2424240).

1397340 is an abundant number, since it is smaller than the sum of its proper divisors (3451140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397340 is a wasteful number, since it uses less digits than its factorization.

1397340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1397340 is about 1182.0913670271. The cubic root of 1397340 is about 111.7979989892.

The spelling of 1397340 in words is "one million, three hundred ninety-seven thousand, three hundred forty".