1000405242 has 28 divisors (see below), whose sum is σ = 2249885850. Its totient is φ = 333467928.

The previous prime is 1000405201. The next prime is 1000405261. The reversal of 1000405242 is 2425040001.

1000405242 is a `hidden beast` number, since 100 + 0 + 40 + 524 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 909565281 + 90839961 = 30159^2 + 9531^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 341617 + ... + 344532.

Almost surely, 2^1000405242 is an apocalyptic number.

1000405242 is an abundant number, since it is smaller than the sum of its proper divisors (1249480608).

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

1000405242 is an frugal number, since it uses more digits than its factorization.

1000405242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686169 (or 686154 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1000405242 is about 31629.1833912923. The cubic root of 1000405242 is about 1000.1350624240.

Adding to 1000405242 its reverse (2425040001), we get a palindrome (3425445243).

The spelling of 1000405242 in words is "one billion, four hundred five thousand, two hundred forty-two".