42501720 has 32 divisors (see below), whose sum is σ = 127505520. Its totient is φ = 11333760.

The previous prime is 42501691. The next prime is 42501721. The reversal of 42501720 is 2710524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42501721) 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, 176971 + ... + 177210.

Almost surely, 2^42501720 is an apocalyptic number.

42501720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42501720 is an abundant number, since it is smaller than the sum of its proper divisors (85003800).

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

42501720 is a wasteful number, since it uses less digits than its factorization.

42501720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354195 (or 354191 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 42501720 is about 6519.3343218461. The cubic root of 42501720 is about 348.9813100447.

The spelling of 42501720 in words is "forty-two million, five hundred one thousand, seven hundred twenty".