42459870 has 64 divisors (see below), whose sum is σ = 108161280. Its totient is φ = 10637568.

The previous prime is 42459839. The next prime is 42459871. The reversal of 42459870 is 7895424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42459871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92682 + ... + 93138.

It is an arithmetic number, because the mean of its divisors is an integer number (1690020).

Almost surely, 2^42459870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42459870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54080640).

42459870 is an abundant number, since it is smaller than the sum of its proper divisors (65701410).

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

42459870 is a wasteful number, since it uses less digits than its factorization.

42459870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 42459870 is about 6516.1238478101. The cubic root of 42459870 is about 348.8667290812.

The spelling of 42459870 in words is "forty-two million, four hundred fifty-nine thousand, eight hundred seventy".