1650042 has 36 divisors (see below), whose sum is σ = 3736590. Its totient is φ = 526176.

The previous prime is 1650041. The next prime is 1650059. The reversal of 1650042 is 2400561.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1535121 + 114921 = 1239^2 + 339^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1649997 and 1650024.

It is not an unprimeable number, because it can be changed into a prime (1650041) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15084 + ... + 15192.

2^1650042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1650042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868295).

1650042 is an abundant number, since it is smaller than the sum of its proper divisors (2086548).

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

1650042 is a wasteful number, since it uses less digits than its factorization.

1650042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1650042 is about 1284.5396062403. The cubic root of 1650042 is about 118.1675776637.

The spelling of 1650042 in words is "one million, six hundred fifty thousand, forty-two".