42151520 has 48 divisors (see below), whose sum is σ = 99973440. Its totient is φ = 16794624.

The previous prime is 42151511. The next prime is 42151523. The reversal of 42151520 is 2515124.

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 = 42151492 and 42151501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42151523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73796 + ... + 74364.

It is an arithmetic number, because the mean of its divisors is an integer number (2082780).

Almost surely, 2^42151520 is an apocalyptic number.

42151520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42151520 is an abundant number, since it is smaller than the sum of its proper divisors (57821920).

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

42151520 is a wasteful number, since it uses less digits than its factorization.

42151520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42151520 is about 6492.4201958900. The cubic root of 42151520 is about 348.0201688227.

Adding to 42151520 its reverse (2515124), we get a palindrome (44666644).

The spelling of 42151520 in words is "forty-two million, one hundred fifty-one thousand, five hundred twenty".