42499236 has 72 divisors (see below), whose sum is σ = 110308800. Its totient is φ = 12659328.

The previous prime is 42499231. The next prime is 42499241. The reversal of 42499236 is 63299424.

It is an interprime number because it is at equal distance from previous prime (42499231) and next prime (42499241).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 42499194 and 42499203.

It is not an unprimeable number, because it can be changed into a prime (42499231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213465 + ... + 213663.

Almost surely, 2^42499236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42499236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55154400).

42499236 is an abundant number, since it is smaller than the sum of its proper divisors (67809564).

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

42499236 is a wasteful number, since it uses less digits than its factorization.

42499236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 254 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 42499236 is about 6519.1438088142. The cubic root of 42499236 is about 348.9745112104.

The spelling of 42499236 in words is "forty-two million, four hundred ninety-nine thousand, two hundred thirty-six".