1397420 has 24 divisors (see below), whose sum is σ = 2966544. Its totient is φ = 552896.

The previous prime is 1397359. The next prime is 1397437. The reversal of 1397420 is 247931.

It is a self number, because there is not a number n which added to its sum of digits gives 1397420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (123606).

2^1397420 is an apocalyptic number.

1397420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397420 is an abundant number, since it is smaller than the sum of its proper divisors (1569124).

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

1397420 is a wasteful number, since it uses less digits than its factorization.

1397420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1397420 is about 1182.1252048747. The cubic root of 1397420 is about 111.8001324879.

The spelling of 1397420 in words is "one million, three hundred ninety-seven thousand, four hundred twenty".