1642542 has 32 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 484800.

The previous prime is 1642519. The next prime is 1642549. The reversal of 1642542 is 2452461.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642549) 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, 2403 + ... + 3009.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1642542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838592).

1642542 is an abundant number, since it is smaller than the sum of its proper divisors (2034642).

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

1642542 is a wasteful number, since it uses less digits than its factorization.

1642542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its digits is 1920, while the sum is 24.

The square root of 1642542 is about 1281.6169474535. The cubic root of 1642542 is about 117.9882684880.

The spelling of 1642542 in words is "one million, six hundred forty-two thousand, five hundred forty-two".