42171340 has 24 divisors (see below), whose sum is σ = 89212032. Its totient is φ = 16744320.

The previous prime is 42171331. The next prime is 42171359. The reversal of 42171340 is 4317124.

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, 4956 + ... + 10435.

It is an arithmetic number, because the mean of its divisors is an integer number (3717168).

Almost surely, 2^42171340 is an apocalyptic number.

It is an amenable number.

42171340 is an abundant number, since it is smaller than the sum of its proper divisors (47040692).

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

42171340 is a wasteful number, since it uses less digits than its factorization.

42171340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15537 (or 15535 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 42171340 is about 6493.9464118516. The cubic root of 42171340 is about 348.0747076143.

Adding to 42171340 its reverse (4317124), we get a palindrome (46488464).

The spelling of 42171340 in words is "forty-two million, one hundred seventy-one thousand, three hundred forty".