42171455 has 8 divisors (see below), whose sum is σ = 51682752. Its totient is φ = 33019168.

The previous prime is 42171449. The next prime is 42171457. The reversal of 42171455 is 55417124.

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 42171455 - 2¹⁸ = 41909311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42171457) 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, 89492 + ... + 89961.

It is an arithmetic number, because the mean of its divisors is an integer number (6460344).

Almost surely, 2^42171455 is an apocalyptic number.

42171455 is a deficient number, since it is larger than the sum of its proper divisors (9511297).

42171455 is a wasteful number, since it uses less digits than its factorization.

42171455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179505.

The product of its digits is 5600, while the sum is 29.

The square root of 42171455 is about 6493.9552662457. The cubic root of 42171455 is about 348.0750240105.

Adding to 42171455 its reverse (55417124), we get a palindrome (97588579).

The spelling of 42171455 in words is "forty-two million, one hundred seventy-one thousand, four hundred fifty-five".