1642923 has 12 divisors (see below), whose sum is σ = 2461368. Its totient is φ = 1095120.

The previous prime is 1642919. The next prime is 1642939. The reversal of 1642923 is 3292461.

It is not a de Polignac number, because 1642923 - 2² = 1642919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 1 + 6⁴ + 4¹⁰ + 2⁹ + 9⁵ + 2¹¹ + 3¹² .

1642923 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1642903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3138 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (205114).

2^1642923 is an apocalyptic number.

1642923 is a deficient number, since it is larger than the sum of its proper divisors (818445).

1642923 is an frugal number, since it uses more digits than its factorization.

1642923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776 (or 6764 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1642923 is about 1281.7655791915. The cubic root of 1642923 is about 117.9973905389.

The spelling of 1642923 in words is "one million, six hundred forty-two thousand, nine hundred twenty-three".