1642493 has 8 divisors (see below), whose sum is σ = 1744320. Its totient is φ = 1542240.

The previous prime is 1642483. The next prime is 1642513. The reversal of 1642493 is 3942461.

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 1642493 - 2¹⁴ = 1626109 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 6⁶ + 4² + 2⁹ + 4⁴ + 9³ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642423) 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, 2288 + ... + 2918.

It is an arithmetic number, because the mean of its divisors is an integer number (218040).

2^1642493 is an apocalyptic number.

It is an amenable number.

1642493 is a deficient number, since it is larger than the sum of its proper divisors (101827).

1642493 is a wasteful number, since it uses less digits than its factorization.

1642493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 5184, while the sum is 29.

The square root of 1642493 is about 1281.5978308346. The cubic root of 1642493 is about 117.9870952085.

Subtracting 1642493 from its reverse (3942461), we obtain a cube (2299968 = 132³).

The spelling of 1642493 in words is "one million, six hundred forty-two thousand, four hundred ninety-three".