42249860 has 12 divisors (see below), whose sum is σ = 88724748. Its totient is φ = 16899936.

The previous prime is 42249859. The next prime is 42249877. The reversal of 42249860 is 6894224.

It can be written as a sum of positive squares in 2 ways, for example, as 28217344 + 14032516 = 5312^2 + 3746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42249860.

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, 1056227 + ... + 1056266.

It is an arithmetic number, because the mean of its divisors is an integer number (7393729).

Almost surely, 2^42249860 is an apocalyptic number.

It is an amenable number.

42249860 is an abundant number, since it is smaller than the sum of its proper divisors (46474888).

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

42249860 is a wasteful number, since it uses less digits than its factorization.

42249860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112502 (or 2112500 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 42249860 is about 6499.9892307603. The cubic root of 42249860 is about 348.2906036936.

The spelling of 42249860 in words is "forty-two million, two hundred forty-nine thousand, eight hundred sixty".