42170733 has 32 divisors (see below), whose sum is σ = 68843520. Its totient is φ = 25300080.

The previous prime is 42170729. The next prime is 42170759. The reversal of 42170733 is 33707124.

It is not a de Polignac number, because 42170733 - 2² = 42170729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42170697 and 42170706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42170773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31116 + ... + 32442.

It is an arithmetic number, because the mean of its divisors is an integer number (2151360).

Almost surely, 2^42170733 is an apocalyptic number.

It is an amenable number.

42170733 is a deficient number, since it is larger than the sum of its proper divisors (26672787).

42170733 is a wasteful number, since it uses less digits than its factorization.

42170733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 42170733 is about 6493.8996758496. The cubic root of 42170733 is about 348.0730375831.

Adding to 42170733 its reverse (33707124), we get a palindrome (75877857).

The spelling of 42170733 in words is "forty-two million, one hundred seventy thousand, seven hundred thirty-three".