42402004 has 6 divisors (see below), whose sum is σ = 74203514. Its totient is φ = 21201000.

The previous prime is 42402001. The next prime is 42402023. The reversal of 42402004 is 40020424.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 21904 = 6510^2 + 148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42402001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300247 + ... + 5300254.

Almost surely, 2^42402004 is an apocalyptic number.

It is an amenable number.

42402004 is a deficient number, since it is larger than the sum of its proper divisors (31801510).

42402004 is a wasteful number, since it uses less digits than its factorization.

42402004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600505 (or 10600503 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 42402004 is about 6511.6821175484. The cubic root of 42402004 is about 348.7081738785.

Adding to 42402004 its reverse (40020424), we get a palindrome (82422428).

The spelling of 42402004 in words is "forty-two million, four hundred two thousand, four".