42029290 has 8 divisors (see below), whose sum is σ = 75652740. Its totient is φ = 16811712.

The previous prime is 42029263. The next prime is 42029293. The reversal of 42029290 is 9292024.

It is a happy number.

It is a Cunningham number, because it is equal to 6483²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 42029289 + 1 = 6483^2 + 1^2 .

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

It is a super-2 number, since 2×42029290² = 3532922435808200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42029293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101455 + ... + 2101474.

Almost surely, 2^42029290 is an apocalyptic number.

42029290 is a deficient number, since it is larger than the sum of its proper divisors (33623450).

42029290 is a wasteful number, since it uses less digits than its factorization.

42029290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202936.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 42029290 is about 6483.0000771248. Note that the first 4 decimals coincide. The cubic root of 42029290 is about 347.6834495380.

The spelling of 42029290 in words is "forty-two million, twenty-nine thousand, two hundred ninety".