1385281 has 8 divisors (see below), whose sum is σ = 1425600. Its totient is φ = 1345680.

The previous prime is 1385273. The next prime is 1385287. The reversal of 1385281 is 1825831.

It is the 481-st star number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385281 - 2³ = 1385273 is a prime.

It is a super-2 number, since 2×1385281² = 3838006897922, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 1385281 parts by 1664 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385287) 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, 7650 + ... + 7828.

It is an arithmetic number, because the mean of its divisors is an integer number (178200).

2^1385281 is an apocalyptic number.

It is an amenable number.

1385281 is a deficient number, since it is larger than the sum of its proper divisors (40319).

1385281 is a wasteful number, since it uses less digits than its factorization.

1385281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 1920, while the sum is 28.

The square root of 1385281 is about 1176.9796089992. The cubic root of 1385281 is about 111.4754649844.

The spelling of 1385281 in words is "one million, three hundred eighty-five thousand, two hundred eighty-one".