1387345 has 8 divisors (see below), whose sum is σ = 1685376. Its totient is φ = 1096176.

The previous prime is 1387327. The next prime is 1387349. The reversal of 1387345 is 5437831.

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 1387345 - 2⁵ = 1387313 is a prime.

It is a super-2 number, since 2×1387345² = 3849452298050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387349) 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, 1257 + ... + 2086.

It is an arithmetic number, because the mean of its divisors is an integer number (210672).

2^1387345 is an apocalyptic number.

It is an amenable number.

1387345 is a deficient number, since it is larger than the sum of its proper divisors (298031).

1387345 is an equidigital number, since it uses as much as digits as its factorization.

1387345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431.

The product of its digits is 10080, while the sum is 31.

The square root of 1387345 is about 1177.8561032656. The cubic root of 1387345 is about 111.5308018155.

The spelling of 1387345 in words is "one million, three hundred eighty-seven thousand, three hundred forty-five".