42072755 has 8 divisors (see below), whose sum is σ = 51561792. Its totient is φ = 32941888.

The previous prime is 42072731. The next prime is 42072763. The reversal of 42072755 is 55727024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42072755 - 2⁶ = 42072691 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89282 + ... + 89751.

It is an arithmetic number, because the mean of its divisors is an integer number (6445224).

Almost surely, 2^42072755 is an apocalyptic number.

42072755 is a deficient number, since it is larger than the sum of its proper divisors (9489037).

42072755 is a wasteful number, since it uses less digits than its factorization.

42072755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179085.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 42072755 is about 6486.3514397541. The cubic root of 42072755 is about 347.8032616555.

Adding to 42072755 its reverse (55727024), we get a palindrome (97799779).

The spelling of 42072755 in words is "forty-two million, seventy-two thousand, seven hundred fifty-five".