42425890 has 16 divisors (see below), whose sum is σ = 82241208. Its totient is φ = 15664896.

The previous prime is 42425833. The next prime is 42425891. The reversal of 42425890 is 9852424.

It can be written as a sum of positive squares in 4 ways, for example, as 20043529 + 22382361 = 4477^2 + 4731^2 .

It is a super-2 number, since 2×42425890² = 3599912284584200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42425891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163047 + ... + 163306.

Almost surely, 2^42425890 is an apocalyptic number.

42425890 is a deficient number, since it is larger than the sum of its proper divisors (39815318).

42425890 is a wasteful number, since it uses less digits than its factorization.

42425890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326373.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 42425890 is about 6513.5159476277. The cubic root of 42425890 is about 348.7736399660.

The spelling of 42425890 in words is "forty-two million, four hundred twenty-five thousand, eight hundred ninety".