1630242 has 36 divisors (see below), whose sum is σ = 3696966. Its totient is φ = 518880.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630242 is 2420361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1610361 + 19881 = 1269^2 + 141^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1630243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34663 + ... + 34709.

2^1630242 is an apocalyptic number.

1630242 is an abundant number, since it is smaller than the sum of its proper divisors (2066724).

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

1630242 is a wasteful number, since it uses less digits than its factorization.

1630242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1630242 is about 1276.8093044774. The cubic root of 1630242 is about 117.6930160941.

The spelling of 1630242 in words is "one million, six hundred thirty thousand, two hundred forty-two".