42351320 has 64 divisors (see below), whose sum is σ = 105092640. Its totient is φ = 15232000.

The previous prime is 42351311. The next prime is 42351343. The reversal of 42351320 is 2315324.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 42351292 and 42351301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43964 + ... + 44916.

Almost surely, 2^42351320 is an apocalyptic number.

42351320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42351320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52546320).

42351320 is an abundant number, since it is smaller than the sum of its proper divisors (62741320).

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

42351320 is a wasteful number, since it uses less digits than its factorization.

42351320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42351320 is about 6507.7891791299. The cubic root of 42351320 is about 348.5691790976.

Adding to 42351320 its reverse (2315324), we get a palindrome (44666644).

It can be divided in two parts, 4235 and 1320, that added together give a palindrome (5555).

The spelling of 42351320 in words is "forty-two million, three hundred fifty-one thousand, three hundred twenty".