1642387 has 6 divisors (see below), whose sum is σ = 1744988. Its totient is φ = 1545504.

The previous prime is 1642373. The next prime is 1642397. The reversal of 1642387 is 7832461.

It is not a de Polignac number, because 1642387 - 2⁷ = 1642259 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁶ + 4⁵ + 2⁵ + 3¹³ + 8 + 7³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2553 + ... + 3130.

2^1642387 is an apocalyptic number.

1642387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1642387 is a deficient number, since it is larger than the sum of its proper divisors (102601).

1642387 is an equidigital number, since it uses as much as digits as its factorization.

1642387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717 (or 5700 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 1642387 is about 1281.5564755406. The cubic root of 1642387 is about 117.9845570138.

The spelling of 1642387 in words is "one million, six hundred forty-two thousand, three hundred eighty-seven".