42055257 has 8 divisors (see below), whose sum is σ = 56103840. Its totient is φ = 28021760.

The previous prime is 42055253. The next prime is 42055261. The reversal of 42055257 is 75255024.

It is an interprime number because it is at equal distance from previous prime (42055253) and next prime (42055261).

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 42055257 - 2² = 42055253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42055253) 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, 7882 + ... + 12092.

It is an arithmetic number, because the mean of its divisors is an integer number (7012980).

Almost surely, 2^42055257 is an apocalyptic number.

It is an amenable number.

42055257 is a deficient number, since it is larger than the sum of its proper divisors (14048583).

42055257 is a wasteful number, since it uses less digits than its factorization.

42055257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543.

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 42055257 is about 6485.0024672316. The cubic root of 42055257 is about 347.7550380060.

The spelling of 42055257 in words is "forty-two million, fifty-five thousand, two hundred fifty-seven".