1642385 has 8 divisors (see below), whose sum is σ = 2016960. Its totient is φ = 1283184.

The previous prime is 1642373. The next prime is 1642397. The reversal of 1642385 is 5832461.

It is an interprime number because it is at equal distance from previous prime (1642373) and next prime (1642397).

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 1642385 - 2¹⁰ = 1641361 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁶ + 4⁴ + 2⁹ + 3¹³ + 8³ + 5³ .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3605 + ... + 4034.

It is an arithmetic number, because the mean of its divisors is an integer number (252120).

2^1642385 is an apocalyptic number.

It is an amenable number.

1642385 is a deficient number, since it is larger than the sum of its proper divisors (374575).

1642385 is an equidigital number, since it uses as much as digits as its factorization.

1642385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687.

The product of its digits is 5760, while the sum is 29.

The square root of 1642385 is about 1281.5556952392. Note that the first 3 decimals coincide. The cubic root of 1642385 is about 117.9845091223.

The spelling of 1642385 in words is "one million, six hundred forty-two thousand, three hundred eighty-five".