42521755 has 8 divisors (see below), whose sum is σ = 51170400. Its totient is φ = 33921216.

The previous prime is 42521749. The next prime is 42521761. The reversal of 42521755 is 55712524.

It is an interprime number because it is at equal distance from previous prime (42521749) and next prime (42521761).

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 42521755 - 2³ = 42521747 is a prime.

It is a super-3 number, since 3×42521755³ (a number of 24 digits) contains 333 as substring.

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, 10050 + ... + 13639.

It is an arithmetic number, because the mean of its divisors is an integer number (6396300).

Almost surely, 2^42521755 is an apocalyptic number.

42521755 is a deficient number, since it is larger than the sum of its proper divisors (8648645).

42521755 is a wasteful number, since it uses less digits than its factorization.

42521755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24053.

The product of its digits is 14000, while the sum is 31.

The square root of 42521755 is about 6520.8707240675. The cubic root of 42521755 is about 349.0361371764.

The spelling of 42521755 in words is "forty-two million, five hundred twenty-one thousand, seven hundred fifty-five".