1387841 has 16 divisors (see below), whose sum is σ = 1736448. Its totient is φ = 1080000.

The previous prime is 1387823. The next prime is 1387847. The reversal of 1387841 is 1487831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387841 is a prime.

It is a super-2 number, since 2×1387841² = 3852205282562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1387798 and 1387807.

It is not an unprimeable number, because it can be changed into a prime (1387847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9116 + ... + 9266.

It is an arithmetic number, because the mean of its divisors is an integer number (108528).

2^1387841 is an apocalyptic number.

It is an amenable number.

1387841 is a deficient number, since it is larger than the sum of its proper divisors (348607).

1387841 is a wasteful number, since it uses less digits than its factorization.

1387841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its digits is 5376, while the sum is 32.

The square root of 1387841 is about 1178.0666364854. The cubic root of 1387841 is about 111.5440916332.

The spelling of 1387841 in words is "one million, three hundred eighty-seven thousand, eight hundred forty-one".