42150420 has 72 divisors (see below), whose sum is σ = 137699016. Its totient is φ = 10374912.

The previous prime is 42150413. The next prime is 42150439. The reversal of 42150420 is 2405124.

It can be written as a sum of positive squares in 4 ways, for example, as 5934096 + 36216324 = 2436^2 + 6018^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42150393 and 42150402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6667 + ... + 11346.

Almost surely, 2^42150420 is an apocalyptic number.

It is an amenable number.

42150420 is an abundant number, since it is smaller than the sum of its proper divisors (95548596).

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

42150420 is a wasteful number, since it uses less digits than its factorization.

42150420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18041 (or 18036 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42150420 is about 6492.3354811655. The cubic root of 42150420 is about 348.0171414466.

Adding to 42150420 its reverse (2405124), we get a palindrome (44555544).

The spelling of 42150420 in words is "forty-two million, one hundred fifty thousand, four hundred twenty".