1397872 has 30 divisors (see below), whose sum is σ = 3152328. Its totient is φ = 598752.

The previous prime is 1397861. The next prime is 1397873. The reversal of 1397872 is 2787931.

It is a super-2 number, since 2×1397872² = 3908092256768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397873) 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, 108 + ... + 1675.

2^1397872 is an apocalyptic number.

It is an amenable number.

1397872 is an abundant number, since it is smaller than the sum of its proper divisors (1754456).

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

1397872 is a wasteful number, since it uses less digits than its factorization.

1397872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1792 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 1397872 is about 1182.3163705202. The cubic root of 1397872 is about 111.8121852261.

The spelling of 1397872 in words is "one million, three hundred ninety-seven thousand, eight hundred seventy-two".