1642242 has 32 divisors (see below), whose sum is σ = 3821184. Its totient is φ = 460800.

The previous prime is 1642231. The next prime is 1642243. The reversal of 1642242 is 2422461.

1642242 is nontrivially palindromic in base 13.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2242 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (119412).

2^1642242 is an apocalyptic number.

It is a pronic number, being equal to 1281×1282.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910592).

1642242 is an abundant number, since it is smaller than the sum of its proper divisors (2178942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642242 is a wasteful number, since it uses less digits than its factorization.

1642242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its digits is 768, while the sum is 21.

The square root of 1642242 is about 1281.4999024581. The cubic root of 1642242 is about 117.9810847781.

The spelling of 1642242 in words is "one million, six hundred forty-two thousand, two hundred forty-two".