1642427 has 8 divisors (see below), whose sum is σ = 1687200. Its totient is φ = 1598400.

The previous prime is 1642423. The next prime is 1642441. The reversal of 1642427 is 7242461.

1642427 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

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 1642427 - 2² = 1642423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642396 and 1642405.

It is not an unprimeable number, because it can be changed into a prime (1642423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10802 + ... + 10952.

It is an arithmetic number, because the mean of its divisors is an integer number (210900).

2^1642427 is an apocalyptic number.

1642427 is a deficient number, since it is larger than the sum of its proper divisors (44773).

1642427 is a wasteful number, since it uses less digits than its factorization.

1642427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its digits is 2688, while the sum is 26.

The square root of 1642427 is about 1281.5720814687. The cubic root of 1642427 is about 117.9855148359.

Adding to 1642427 its reverse (7242461), we get a palindrome (8884888).

The spelling of 1642427 in words is "one million, six hundred forty-two thousand, four hundred twenty-seven".