1642623 has 8 divisors (see below), whose sum is σ = 2202288. Its totient is φ = 1089024.

The previous prime is 1642601. The next prime is 1642631. The reversal of 1642623 is 3262461.

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

It is not a de Polignac number, because 1642623 - 2⁶ = 1642559 is a prime.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1642593 and 1642602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642633) 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 7 ways as a sum of consecutive naturals, for example, 840 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (275286).

2^1642623 is an apocalyptic number.

1642623 is a deficient number, since it is larger than the sum of its proper divisors (559665).

1642623 is a wasteful number, since it uses less digits than its factorization.

1642623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033.

The product of its digits is 1728, while the sum is 24.

The square root of 1642623 is about 1281.6485477696. The cubic root of 1642623 is about 117.9902079397.

The spelling of 1642623 in words is "one million, six hundred forty-two thousand, six hundred twenty-three".