1397040 has 40 divisors (see below), whose sum is σ = 4331568. Its totient is φ = 372480.

The previous prime is 1397029. The next prime is 1397041. The reversal of 1397040 is 407931.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397040.

It is not an unprimeable number, because it can be changed into a prime (1397041) 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, 2671 + ... + 3150.

2^1397040 is an apocalyptic number.

1397040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397040 is an abundant number, since it is smaller than the sum of its proper divisors (2934528).

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

1397040 is a wasteful number, since it uses less digits than its factorization.

1397040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837 (or 5831 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1397040 is about 1181.9644664710. The cubic root of 1397040 is about 111.7899976437.

The spelling of 1397040 in words is "one million, three hundred ninety-seven thousand, forty".