42049730 has 8 divisors (see below), whose sum is σ = 75689532. Its totient is φ = 16819888.

The previous prime is 42049703. The next prime is 42049747. The reversal of 42049730 is 3794024.

It can be written as a sum of positive squares in 2 ways, for example, as 40208281 + 1841449 = 6341^2 + 1357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42049693 and 42049702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102477 + ... + 2102496.

Almost surely, 2^42049730 is an apocalyptic number.

42049730 is a deficient number, since it is larger than the sum of its proper divisors (33639802).

42049730 is a wasteful number, since it uses less digits than its factorization.

42049730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204980.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 42049730 is about 6484.5763161520. The cubic root of 42049730 is about 347.7398030791.

The spelling of 42049730 in words is "forty-two million, forty-nine thousand, seven hundred thirty".